Distribution valve and method of assembly thereof

FIELD: mechanics.

SUBSTANCE: device and method are intended for hydraulic control devices operated at higher vibration and impact loads. The proposed device comprises a body with a slide valve with a stem furnished with a flat and axial slit-like slots separated by webs arranged in the slide valve opposite the intake orifices, a slide valve turn limiter, an expanding ring with opening equal to H and receiving the expanding ring retainer representing a screw. The screw head diameter D is defined by the formula D<H, the expanding ring end faces being furnished with the chamfers. The proposed method includes passing the body wall through the expanding ring opening and fitting one end of the aforesaid ring into the body inner part and the other one into the circular groove, scrolling the ring against the stop in the circular groove and till one its end gets aligned with the body slot edge. It also comprises setting the cylindrical segment on the said body slot edge till its free end thrusts against the groove, fitting into the slide valve body and locking by moving the said segment along the body slot edge and slide valve flat till it thrusts against the expanding ring. Now the aforesaid ring is scrolled till its opening gets into the position opposite to the aforesaid segment. Prior to the aforementioned operations, a threaded hole is made in the slide valve body, in the plane crossing the circular groove and flats are made of the expanding ring end faces. The opening fitted in the aforesaid position, a screw is fitted into the aforesaid threaded hole so that its head is arranged between the ring end faces. Now the screw is locked relative to the slide valve body.

EFFECT: higher reliability of assembly, vibration and impact resistance.

2 cl, 2 dwg

 

The invention relates to hydraulic control devices and liquid distribution, mainly to Bolotnikova devices operating in conditions of high vibration and shock loads.

Known distribution spool device described in [1], comprising a housing with inlet holes and a rectangular channel flat valve fixed relative to rotation relative to the housing, with the shank and slotted grooves.

The disadvantage of this design is the lack of adaptability.

The known method of the spool Assembly of the switchgear described in [1], including the installation of a flat slide valve shank in a rectangular channel in the device, which simultaneously is the limitation of the movement of the spool in the transverse plane.

The disadvantage of this method is the low adaptability, due to the need of execution in the case of a rectangular channel.

The closest to the proposed device prototype is spool switchgear described in [2], containing the enclosure with inlet and outlet holes and groove mounted in the casing, a cylindrical valve shank with flats, and with an axial slit grooves, split the mi installed in the spool opposite the inlet openings of the housing jumpers, made in the form of pins, the rotation limiter spool, made in the form of a cylindrical segment that is installed in the groove of the housing and contacting its base inch shank and Rethimno ring with maw installed in an annular groove made on the outer surface of the housing and the cylindrical segment, and the groove in the casing in the plane perpendicular to its axis, while Zev spring ring is made of size N.

The closest to the proposed method of the prototype is the way of the spool Assembly of the switchgear described in [2], which includes a transmission housing wall side of the groove through the mouth of the camshaft ring, the establishment of one of the end rings in the inner part of the housing and the other end into the annular groove, the subsequent spinning rings to complete the installation in an annular groove and align one of its ends with the cut groove of the housing, the installation of a cylindrical segment on the cut groove of the housing with the focus of the free end of the ring into the groove made in the cylindrical segment, the installation in the housing of the valve and fixing it against rotation relative to its axis with a cylindrical segment by moving the segment on the basis of the cut groove of the casing and the flats of the valve until it stops in Rethimno ring, scroll to the last the last to install his throat in a diametrically opposite segment position.

The disadvantage of this device and method is the possibility of twisting of the ring and loss of the segment when vibration and shock loads.

The technical result of the use of the invention is to improve the reliability of the Assembly, and vibrodiagnostic by preventing rotation of the ring in the groove of the housing.

The technical result is achieved by the spool switchgear, comprising a housing, made with inlet and outlet holes and groove mounted in the casing, a cylindrical valve shank with flats, and with an axial slit grooves separated installed in the spool opposite the inlet openings of the housing with a jumper, made in the form of pins, the rotation limiter spool, made in the form of a cylindrical segment that is installed in the groove of the housing and contacting its base inch shank and Rethimno ring with maw installed in an annular groove made on the outer surface of the housing and the cylindrical segment, and the groove in the casing in the plane perpendicular to its axis, while Zev spring ring is made of size N, in contrast to prototype it introduced the camshaft position lock rings made in the form of a screw mounted in the threaded hole, once adenom in the plane perpendicular to the axis of the body bore, passing through an annular groove made on the outer surface of the shell and the axis of the threaded hole perpendicular to the cut groove of the body, and the diameter D of the screw head is determined by the formula D≤H, where D is the diameter of the screw head; H - Zev camshaft ring, with the ends of the camshaft o-rings are made of a facet.

The technical result is achieved by the fact that in the proposed method the spool Assembly of the switchgear, including the transmission housing wall side of the groove through the mouth of the camshaft ring, the establishment of one of the end rings in the inner part of the housing and the other end into the annular groove, the subsequent spinning rings to complete the installation in an annular groove and align one of its ends with the cut groove of the housing, the installation of a cylindrical segment on the cut groove of the housing with the focus of the free end of the ring into the groove made in the cylindrical segment, the installation in the housing of the valve and fixing it against rotation about its axis with a cylindrical segment by moving the segment on the basis of the cut groove of the casing and the flats of the valve until it stops in Rethimno ring, spinning the latest up to install his throat in a diametrically opposite segment position, unlike the prototype before passing walls and body through the mouth of the camshaft ring on the body in the plane perpendicular to the axis of the body bore, passing through an annular groove, is placed on the outer surface of the shell, execute the screw hole, and the ends of the camshaft rings perform chamfer, after installing OS camshaft ring in diametrically opposite segment position in the threaded bore of the housing screw screw, placing his head between the ends of the camshaft ring) and the screw relative to the body.

Execution characteristics of the device and method of fixation of camshaft ring relative to the body and can improve vibrodiagnostic spool switchgear.

In the application described the group of inventions combined to form a single inventive sense.

Figure 1 presents the proposed spool switchgear, figure 2 presents a section along a-A.

Spool switchgear includes a valve 1 located in the housing 2. The valve 1 has holes 3 have pins 4 and the housing 2 is made of the inlet openings 5. Holes 3 and 5 are processed together. The valve 1 is equipped with working bands 6, which is made slotted grooves 7, separated by pins 4. On the shank 8 of the valve 1 has a chamfer 9 and the housing 2 from the side of the shank 8 is made a groove 10, which set the priority of the rotation limiter spool 1, made in the form of a cylindrical segment 11, facing a flat base to the chamfer 9. On the outer surface of the housing 2 and the segment 11 is made a groove 12 in which is located Rethimno ring 13 with maw N. In the housing 2 in a plane perpendicular to the axis of the valve housing 2 through an annular groove 12, a threaded hole in which the set screw 14 with head diameter D. On the ends of the camshaft ring 12 is made of a chamfer 15.

The device operates as follows. When the displacement of the spool 1 relative to the housing 2 from the zero position in which the pins 4 are against the inlet holes 5 in the housing 2, to the left or right, the cavity pressure is connected through the opened slit groove 7, is made in the belt 6, with one of the cavities of the hydraulic cylinder, the other cylinder chamber is communicated with the drain, and the velocity of the piston rod of the hydraulic cylinder is proportional to the square opening of the slit grooves 7. When the displacement of the spool 1 of his 9 inch interacts with the base of the segment 11 and prevents the district rotation of the spool 1 relative to the housing 2 to align the edges of the pins 4 and holes 5 in the neutral position of the spool 1 relative to the housing 2. Rethimno ring 13, is placed in the groove 12, secures the segment 11 on the housing 2. The screw 14 captures Rethimno ring 13 against rotation relative to the housing 2.

With the royals as follows. On the housing 2 is carried out screw hole for fixing the camshaft ring 13, and the ends of the camshaft ring 13 perform chamfer 15. Take Rethimno ring 13 together and injected into his mouth N wall of the housing 2 from the side of the groove 10, with one end of the ring 13 is located in the internal cavity of the housing 2, and a second end located in the groove 12, after which the ring 13 without deformation of the scroll on the housing 2 to complete its installation in the groove 12. Combine one of its ends with a cut groove 10 of the housing 2 and establish cylindrical segment 11 on the cut groove 10 of the housing 2 with the stop of the free end of the ring 13 in the groove 12, is made in the cylindrical segment 11, is installed in the housing 2 of the valve 1 and lock it against rotation about its axis with a cylindrical segment 11 by moving the latter on the basis of the cut groove 10 of the housing 2 and the chamfer 9 of the valve 1 is fully inserted in Rethimno ring 13. Scroll ring 13 in the groove 12 to install his throat N in diametrically opposite segment 11 position. In the threaded hole of the housing 2 screw screw 14, placing his head between the ends of the camshaft ring 13,) and the screw 14 relative to the housing 2, for example, by using a sealant.

Fixing camshaft ring relative to the housing by means of a screw preferable, since the fixing ring to the housing, for example, using svarc the design is not collapsible, and in the ring, you may experience thermal stresses or cracks.

Performing in the plane perpendicular to the axis of the valve housing 2 through an annular groove 12, the screw holes and install screws 14 protect Rethimno ring 13 against rotation in the groove 12. The execution of the diameter of the screw head 14 corresponding to this formula allows us to accommodate the screw head 14 between the ends of the camshaft ring 13. And execution on the ends of the camshaft ring 13 chamfers 15 allows you to scroll Rethimno ring 13 through the sharp edge of the screw holes formed at the intersection of the profile grooves 12.

Execution characteristics of the device and method of fixation of camshaft ring relative to the body and can improve vibrodiagnostic spool switchgear, as well as the reliability of the Assembly.

Literature

1. Blackburn J., Richof G., Scherer J. Hydraulic and pneumatic power systems control. M: Foreign literature, 1962, s-233.

2. Patent RU NO. 2003850, F15 13/02, 1990

1. Spool switchgear, comprising a housing, made with inlet and outlet holes and groove mounted in the casing, a cylindrical valve shank with flats, and with an axial slit grooves separated have been fitted the mi in the spool opposite the inlet openings of the housing jumpers, made in the form of pins, the rotation limiter spool, made in the form of a cylindrical segment that is installed in the groove of the housing and contacting its base inch shank and Rethimno ring with maw installed in an annular groove made on the outer surface of the housing and the cylindrical segment, and the groove in the casing in the plane perpendicular to its axis, while Zev spring ring is made of size N, characterized in that it introduced the camshaft position lock rings made in the form of a screw mounted in the threaded hole located in the plane perpendicular to the axis of the body bore passing through an annular groove made on the outer surface of the shell and the axis of the threaded hole perpendicular to the cut groove of the body, and the diameter D of the screw head is determined by the formula

D≤H,

where D is the diameter of the screw head;

N - Zev camshaft ring,

at the ends of the camshaft o-rings are made of a facet.

2. The method of the spool Assembly of the switchgear, including the transmission housing wall side of the groove through the mouth of the camshaft ring, the establishment of one of the end rings in the inner part of the housing and the other end into the annular groove, the subsequent spinning rings to the Noi installed in the annular groove and overlapping one of its ends with the cut groove of the housing, the installation of a cylindrical segment on the cut groove of the housing with the focus of the free end of the ring into the groove made in the cylindrical segment, the installation in the housing of the valve and fixing it against rotation about its axis with a cylindrical segment by moving the segment on the basis of the cut groove of the casing and the flats of the valve until it stops in Rethimno ring, spinning the latest up to install his throat in a diametrically opposite segment position, characterized in that the front of the transmission housing wall through Zev camshaft ring on the housing in a plane perpendicular to the axis of the body bore, passing through an annular groove, is placed on the outer surface of the shell, execute the screw hole, and the ends of the camshaft rings perform chamfer, after installing OS camshaft ring in diametrically opposite segment position in the threaded bore of the housing screw screw, placing his head between the ends of the camshaft ring) and the screw relative to the body.



 

Same patents:

FIELD: fluid-pressure actuators.

SUBSTANCE: supply unit comprises hydraulic accumulator, housing, and slide of the reduction valve which is mounted in the housing to define pressure, drain, and reduced pressure spaces. The slide is mounted for permitting disconnection of the pressure space from the reduction space. The hydraulic accumulator is connected with the housing from the side of the space of the reduction pressure. The safety valve is interposed between the space of the reduced pressure and the drain space. The trough opening that connects the space of the reduced pressure with the space of the safety valve is made along the axis of the slide. The safety valve is mounted in the drain space for permitting it to be pressed to the face surface of the slide by means of its spring. Between the pressure space and pressure line is the check valve that prevents the fluid to flow into the pressure line. The slide is made of the direct-action valve provided with the shank that is inserted in the drain space. The part of the slide that is opposite to the shank is diverging from the shank body and bears on the seat defined by the projections on the housing. The area of the inner section defined by the line of contact between the seat and slide of the reduction valve is greater that that of the inner section defined by the line of contact between the face part of the slide shank and safety valve.

EFFECT: enhanced reliability.

8 cl, 2 dwg

FIELD: fluid-pressure actuators.

SUBSTANCE: hydraulic distributor comprises lever-blade which embraces the flat slide and separates the internal space of the hydraulic distributor into two spaces. The lever-blade is made in block with the control shaft. The height of the bearing ring and the height of the lever-blade are related as H/h = 1.1-1.27, where H is the height of the bearing ring in mm and h is the height of the lever-blade in mm. In initial position inside the bearing ring, the lever-blade is interposed between the pressing and distributing plates asymmetrically to define sealing slots.

EFFECT: enhanced reliability and prolonged operation live.

5 cl, 7 dwg

FIELD: hydromechanical drives in aircraft control systems; control of front wheel in taxiing mode and dampening vibrations of freely oriented front wheel in dampening mode.

SUBSTANCE: proposed wheel turning mechanism includes actuator in form of hydraulic motor, distributing unit, hydraulic compensator, two-position valve communicated with distributing unit, actuator, hydraulic compensator and pressure hydraulic line. Distributing unit is made in form of swivel control spool valve and back coupling spool valve. Wheel turning mechanism includes also two safety valves connecting the hydraulic lines running to hydraulic motor and two adjustable throttle valves built in hydraulic lines communicated with two-position valve. Two-position valve has inner passage communicating the hydraulic lines running to hydraulic motor. Proposed mechanism ensures temperature compensation of working fluid in hydraulic motor chambers and replenishing the hydraulic motor chambers directly from hydraulic compensator in case of leakage; simultaneously, dampening of vibrations of freely oriented wheel is ensured at motion of aircraft on ground at working speed.

EFFECT: enhanced efficiency and reliability.

1 dwg

The invention relates to hydro, in particular to valves with flat rotary valve used in the hydraulic actuator with manual operation, for example in hydromechanical steering actuator servo control systems of aircraft

The invention relates to a device for the hydraulic installation components, in particular of a roller portion of the roller section of the transaction in the continuous casting installation

The invention relates to hydro, in particular to valves with flat rotary valve used in the hydraulic actuator with manual operation, for example in hydromechanical steering actuator servo control systems of aircraft

The invention relates to hydro, in particular to valves with flat rotary valve used in the hydraulic actuator with manual operation, for example in hydromechanical steering actuator servo control systems of aircraft

Hydraulic valve // 2188355

The invention relates to hydromelioration and can be used in valves of various hydraulic devices

FIELD: hydromechanical drives in aircraft control systems; control of front wheel in taxiing mode and dampening vibrations of freely oriented front wheel in dampening mode.

SUBSTANCE: proposed wheel turning mechanism includes actuator in form of hydraulic motor, distributing unit, hydraulic compensator, two-position valve communicated with distributing unit, actuator, hydraulic compensator and pressure hydraulic line. Distributing unit is made in form of swivel control spool valve and back coupling spool valve. Wheel turning mechanism includes also two safety valves connecting the hydraulic lines running to hydraulic motor and two adjustable throttle valves built in hydraulic lines communicated with two-position valve. Two-position valve has inner passage communicating the hydraulic lines running to hydraulic motor. Proposed mechanism ensures temperature compensation of working fluid in hydraulic motor chambers and replenishing the hydraulic motor chambers directly from hydraulic compensator in case of leakage; simultaneously, dampening of vibrations of freely oriented wheel is ensured at motion of aircraft on ground at working speed.

EFFECT: enhanced efficiency and reliability.

1 dwg

FIELD: fluid-pressure actuators.

SUBSTANCE: hydraulic distributor comprises lever-blade which embraces the flat slide and separates the internal space of the hydraulic distributor into two spaces. The lever-blade is made in block with the control shaft. The height of the bearing ring and the height of the lever-blade are related as H/h = 1.1-1.27, where H is the height of the bearing ring in mm and h is the height of the lever-blade in mm. In initial position inside the bearing ring, the lever-blade is interposed between the pressing and distributing plates asymmetrically to define sealing slots.

EFFECT: enhanced reliability and prolonged operation live.

5 cl, 7 dwg

FIELD: fluid-pressure actuators.

SUBSTANCE: supply unit comprises hydraulic accumulator, housing, and slide of the reduction valve which is mounted in the housing to define pressure, drain, and reduced pressure spaces. The slide is mounted for permitting disconnection of the pressure space from the reduction space. The hydraulic accumulator is connected with the housing from the side of the space of the reduction pressure. The safety valve is interposed between the space of the reduced pressure and the drain space. The trough opening that connects the space of the reduced pressure with the space of the safety valve is made along the axis of the slide. The safety valve is mounted in the drain space for permitting it to be pressed to the face surface of the slide by means of its spring. Between the pressure space and pressure line is the check valve that prevents the fluid to flow into the pressure line. The slide is made of the direct-action valve provided with the shank that is inserted in the drain space. The part of the slide that is opposite to the shank is diverging from the shank body and bears on the seat defined by the projections on the housing. The area of the inner section defined by the line of contact between the seat and slide of the reduction valve is greater that that of the inner section defined by the line of contact between the face part of the slide shank and safety valve.

EFFECT: enhanced reliability.

8 cl, 2 dwg

FIELD: mechanics.

SUBSTANCE: device and method are intended for hydraulic control devices operated at higher vibration and impact loads. The proposed device comprises a body with a slide valve with a stem furnished with a flat and axial slit-like slots separated by webs arranged in the slide valve opposite the intake orifices, a slide valve turn limiter, an expanding ring with opening equal to H and receiving the expanding ring retainer representing a screw. The screw head diameter D is defined by the formula D<H, the expanding ring end faces being furnished with the chamfers. The proposed method includes passing the body wall through the expanding ring opening and fitting one end of the aforesaid ring into the body inner part and the other one into the circular groove, scrolling the ring against the stop in the circular groove and till one its end gets aligned with the body slot edge. It also comprises setting the cylindrical segment on the said body slot edge till its free end thrusts against the groove, fitting into the slide valve body and locking by moving the said segment along the body slot edge and slide valve flat till it thrusts against the expanding ring. Now the aforesaid ring is scrolled till its opening gets into the position opposite to the aforesaid segment. Prior to the aforementioned operations, a threaded hole is made in the slide valve body, in the plane crossing the circular groove and flats are made of the expanding ring end faces. The opening fitted in the aforesaid position, a screw is fitted into the aforesaid threaded hole so that its head is arranged between the ring end faces. Now the screw is locked relative to the slide valve body.

EFFECT: higher reliability of assembly, vibration and impact resistance.

2 cl, 2 dwg

FIELD: engineering industry.

SUBSTANCE: hydraulic distributor is meant for manually and remotely controlled hydraulic drives, in hydraulic mechanical steering drives of aircraft follow-up control systems. Hydraulic distributor consists of a casing, supporting ring, centre drive shaft, and flat rotary valve with distribution and drain channels and with radial internal slot, which is connected kinematically to and hinged to the drive shaft. Casing is made in the form of a hollow cylinder with two annular sealing elements provided on external cylindrical surface and one end whereof is closed with a bottom with a central throat wherein there installed is profiled edge of drive shaft with the possibility of rotation movement, and end surface of open cylinder end is equipped with threaded holes uniformly arranged in a circumferential direction and meant for bolts fixing and rigidly attaching the cylinder to distribution bushing.

EFFECT: improving reliability.

3 cl, 8 dwg

FIELD: engineering industry.

SUBSTANCE: invention refers to hydraulic drive of quarry drilling machine meant for drilling rocky blast holes with changing physical properties. Device is provided with valve distribution units, each of which consists of a casing with supply, discharge and drain channels with safety and pilot-operated valves built in the casing, throttle plate and control pilots. Casing, safety and pilot-operated valves, throttle plate installed on pilot-operated valve, and pilots comprise three-line three-position working liquid distribution unit with protection of hydraulic line supplying working liquid to consumer from overloads and its free discharge in reverse drain direction with controlled actuation time of pilot-operated valve at switching off hydraulic drive thus eliminating hydraulic impacts. Working liquid for controlling hydraulic mechanisms is distributed with three units according to supply, discharge and drain lines connection diagrams, as well as valve control electromagnets actuation program.

EFFECT: providing power and speed movements of mechanisms by means of three-line valve distribution with direct protection of hydraulic lines from overloads and hydraulic impacts.

2 dwg

FIELD: machine building.

SUBSTANCE: hydro-distributor is used in hydraulic drives with manual or remote control. The hydro-distributor is made with a flat rotary slide and central drive in form of an integral unit-module which is easily and conveniently installed directly into the case of the hydraulic drive. Range of rotation angles of a driven shaft and slide from neutral and initial positions is considerably expanded, thus facilitating hydro-dynamic unloading. The hydraulic distributor is furnished with hinged connection of the driven shaft with the flat rotary slide in form of a crank-drive mechanism.

EFFECT: increased reliability, technical-economic properties, increased efficiency of control of slide and stability of output parametres of hydro-distributor.

4 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: hydraulic valve comprising several ports communicating to relief channel (5) and slide valve (8) arranged with the possibility of displacement for control of communication between channels. Slide valve has side transverse seal (13) arranged as a whole with slide valve and engaged with relief channel. In one position valve slide (8) isolates the first port (9) from the second port (10). In another position of slide, transverse seal (13) interacts with the first port (9) and provides for communication between the first port (9) and the second port (10) by means of channel (14) arranged inside slide valve. Slide valve includes the first and second sections (8a and 8b) with various efficient area of cross section, besides at each section sealing element (16, 17) arranged as a whole forms radial seal between slide and relief valve (5).

EFFECT: using supply port, working fluid pressure is maintained outside the slide valve so that force is provided trying to close the valve as a result of various areas of cross section.

11 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: spool-type valve includes body with radial holes and slot, spool valve installed in the body with shank and axial slots separated with plugs installed in spool valve opposite radial holes of body and made in the form of pins and forming throttle edges with radial holes of the housing, as well as turn restrictor arranged in slot of body. Slot is made in it in the plane passing through hole axis for spool valve; turn restrictor is made in the form of cylindrical bar installed in hole of shank, made in the plane passing through spool valve axis; at that, diametre d of bar corresponds to width of slot of body, and length H of bar is determined by the formula: , where r -radius of spool valve; H - length of cylindrical bar; R - radius of body; at that, angle between slot axis and axes of radial holes in plane projection perpendicular to hole axis for spool valve corresponds to angle between axis of cylindrical bar and axes of plugs of spool valve in the same plane projection. Manufacturing method of spool-type valve includes making of slot in body, primary installation of spool valve into the body and fixture of spool valve relative to the body, making of radial holes both in the body and in the spool valve, removal of spool valve from the body and making on its belts in plane of radial holes of axial slots, installation into radial holes of spool valve of plugs, heat treatment and final machining of the appropriate cylindrical surfaces of spool valve and body, and repeated installation of spool valve into the body. Slot is made in the plane passing through axis of hole for spool valve; prior to primary installation of spool valve into the body a hole is made in spool valve shank in the plane passing through spool valve axis with diametre corresponding to width of slot in the body; process pin is installed in the above hole and it has the length exceeding spool valve diametre; at that, at primary installation of spool valve into the body the pin is installed into the body slot; process pin is removed from the hole prior to heat treatment and final machining, and cylindrical bar with diametre similar to that of process pin is installed prior to repeated installation of spool valve into the body; after that, cylindrical bar is fixed in shank of spool valve. The above features of the device and method provide alignment of spool vale in body hole at simultaneous elimination of barring of spool valve in circular direction.

EFFECT: improving sensitivity of spool-type valve.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: in manufacturing method of a spool-type valve for a hydraulic load-bearing element including a metal housing with a sleeve and a spool valve, the sleeve is made from leucosapphire monocrystal, its stress reaches 5095% of pressure in the system by its mutual heating with metal housing till design temperature and its pressing into the housing with their further joint cooling. Treatment of inner surface of the sleeve is performed after it is pressed and cooled, and a gap between the sleeve and the spool valve is made in the range of 0.28 mcm. At manufacture of the sleeve and the spool valve their axes and axis 0001 of leucosapphire monocrystal is aligned between them.

EFFECT: higher control accuracy of working medium flow rate.

6 cl, 3 dwg

Up!