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Pneumatic three-way shut-off valve
Model: ZMAQ (Q)
Nominal diameter: DN15 ~ 200mm
Nominal pressure: PN10 ~ 64MPa
Temperature: -60 ~ 450 ℃
Main material: HT200, ZG230-450 ZG1Cr18Ni9Ti ZGOCr18Ni12M02Ti
Drive mode: pneumatic
Design criteria: GB / T17213
Flange standard: GB / T9113, JB / T79 , HG20594 and other standard
Inspection standards: GB / T4213
Connection: flange (FF RF RTJ), welding (SW BW), the screw (for a "less)

First, the pneumatic three-way shut-off valve overview

Pneumatic three-way shut-off valve with top guide structure, equipped with multi-spring actuator. Has the advantages of compact structure, light weight, action-sensitive, S-streamline fluid flow line, small pressure drop loss, valve capacity, easy disassembly. Shut-off valve to accept the signal from the regulating instrument, cut off, open or change the media flow to achieve automatic control of process parameters such as pressure, flow, temperature or liquid level. Widely used in petroleum, chemical, metallurgy, electric power, light industry, textile and other industrial sectors of the production process automatic control and remote control system.  This series of products are film, piston two. The valve body structure has a single seat, sleeve, two seats (three two-way) three, the sealing form of packing seal and bellows seal two, the product nominal pressure grade PN10,16,40,64 four, nominal diameter Range DN20 ~ 200mm. For fluid temperature from -60 ~ 450 ℃. Leakage level for the IV or Ⅵ level. Flow characteristics for the quick opening.


   Second, pneumatic three-way cut-off valve product characteristics

1, Shut-off valve adopts multi-spring actuator and adjusting mechanism to connect with three columns, the whole height can be reduced by about 30% and the weight can be reduced by about 30%.  
 2, the valve body designed by the principle of fluid mechanics such as cross-section low flow resistance flow channel, the rated flow coefficient increased by 30%.
 3, the valve part of the seal has two types of tight and soft seal, close-type surfacing carbide, soft seal for the soft material production, sealing performance when closed.
 4, balanced type trim, improve the allowable pressure drop off valve.
5, the bellows sealed type of valve stem to form a complete seal, blocking the possibility of media leakage.
6, piston-type actuator, operating force, the use of large pressure.


   Third, pneumatic three-way shut-off valve main parts and materials

Valve body, sealing sleeve: HT200, ZG230-450 ZG1Cr18Ni9Ti ZGOCr18Ni12M02Ti 
 Spool, valve seat: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti Welding Department Tai Lai alloy 
 sleeve, valve plug: 1Cr18Ni9Ti OCr18Ni12M02Ti 1Cr18Ni9Ti Welding Department Tai Cai alloy 
 filler: Teflon , Flexible Graphite 
 Corrugated Diaphragm: NBR Clamp Reinforced Polyester Fabric 
 Spring: 60Si2Mn 
 Stem, Push Rod: 2Cr13   , 1Cr18Ni9Ti Spool, Plug (Soft): Reinforced Teflon 
 Bellows: 1Cr18Ni9Ti


 Fourth, pneumatic three-way shut-off valve specifications and technical parameters

Nominal diameter DN (mm) 15 20 25 32 40 50 65 80 100 125 150 200
Rated flow coefficient KV Single seat, two-seater 5 7 11 20 30 48 75 120 190 300 480 760
Sleeve 11 20 30 48 75 120 190 300 480 760
Nominal pressure PN (MPa) 1.0 1.6 4.0 6.4
Rated travel (mm) 8 12 20 25 40 50
Effective area (cm 2) ZMQ type 100 200 400 600 1000
ZSQ type 100 125 160 250
Allow leakage Hard seal 1 / h - general: 10 -4 X-rated valve capacity; tight type: Single, two-seater: 1.2 X -7 , sleeve 5X10-6 X-rated valve capacity
Soft seal Level VI
Allowable pressure difference (MPa) ZMQ PN is working 6.4 5.09 2.91 1.85 2.18 1.33 1.52 0.99 0.62 0.60 0.69 0.39
ZMQ PN reaction 6.4 6.4 3.88 2.47 2.91 1.77 2.03 1.32 0.83 0.80 0.92 0.52
ZSQ PN 6.4 6.1 3.5 2.3 3.0 1.9 1.9 1.5 0.93 0.84 0.65 0.47
ZMS QM Nominal pressure
Signal pressure (kPa) ZMQ 0 or 250
ZSQ 0 or 400 ~ 600

1) The performance indicators of this product are in accordance with GB / T4213-92; 
 2) If the allowable pressure difference in the table is greater than the nominal pressure, the nominal pressure shall be taken as the nominal pressure and less than or equal to the nominal pressure; 
 3) Value, can be equipped with different cylinders to increase the allowable pressure 
 
   Fifth, pneumatic three-way cut off valve dimensions and weight

Nominal diameter DN (mm) 15 20 25 32 40 50 65 80 100 125 150 200
A ф 196 ф 232 ф 308 ф 394 ф 498
L PN16, 40 130 150 160 180 200 230 290 310 350 400 480 600
PN64 210 230 230 260 260 300 340 380 430 500 550 650
H PN16, 40 305 340 345 370 380 390 475 490 500 765 825 927
PN64 320 350 354 372 382 397 473 475 517 805 882 815
Bellows sealed type 375 409 414 431 441 468 555 570 613 855 915 1017
H1 PN16, 40 50 53 58 70 75 83 93 100 110 125 143 170
PN64 60 65 70 77.5 85 90 100 85 125 148 170 208
H2 PN16 115 115 121 130 140 153 178 190 200 260 320 360
PN40 125 125 130 140 150 160 185 200 220 280 320 380
PN64 150 150 160 170 180 200 230 250 282 310 430 480
H3 PN16, 40 404 415 428 448 468 561 578 590 886 1008 1120
PN64 365 430 498 528 528 530 535 540 600 890 1208 1305
Bellows sealed type 395 465 478 509 509 548 641 658 670 976 1098 1210
Weight (kg) Standard type 10 10 12 15 18 23 35 45 60 75 90 120
Bellows sealed type 12 12 14 17 20 26 38 48 64 79 95 125


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