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ZMAN-16D pneumatic anti-spring low-temperature double-seat regulating valve

ZMAN-16D pneumatic anti-spring low-temperature double-seat regulating valve

Overview of ZMAN-16D pneumatic anti-spring low-temperature double-seat control valve: ZMAN-16D pneumatic anti-spring low-temperature double-seat control valve pneumatic film low-temperature control valve is a deformation product of single-seat and double-seat control valves. It is different from normal temperature in that it adopts a long-necked upper valve cover to make the packing work at normal temperature. It is suitable for the adjustment of the medium (such as liquid oxygen, liquid nitrogen, etc.) under the low temperature and strong state of -60~-250℃. To ensure the accuracy of adjustment, a positioner must be used.

  • Item NO.:

    XUVAL77-98
  • Lead Time:

    45Days
  • Product Orgin:

    CHINA
  • Brand:

    XUVAL
  • Shipping Port:

    Shanghai
  • Payment:

    100%TT
  • Color:

    Silvery
  • MOQ:

    10
Products Details

ZMAN-16D pneumatic anti-spring low-temperature double-seat regulating valve

Structural principle of pneumatic low-temperature double-seat control valve:
The pneumatic low-temperature control valve is composed of a pneumatic film actuator and a low-temperature-resistant single-seat and double-seat control valve. The signal pressure from the regulator is input into the air chamber of the pneumatic membrane actuator to generate thrust, and the valve core is driven by the connecting rod. The change of the valve core position changes the flow cross-sectional area of the valve and realizes the adjustment of the medium flow.


Precautions for pneumatic low-temperature double-seat control valve:
1. It should be installed vertically on a horizontal pipeline. In special circumstances, when horizontal or inclined installation is required, support should generally be added. The circular board installed on the wall of the incubator should be parallel to the wall of the incubator.
2. It should be installed near the ground or floor for maintenance and repair. For those equipped with a positioner or handwheel mechanism, it should be ensured that the observation, adjustment and operation are convenient.
3. Generally, by-pass pipelines are set up so as to switch to manual operation when the automatic control system fails or is repaired, so as not to stop production.
4. When a handwheel mechanism is installed, manual operation can also be omitted when the bypass pipeline is installed, and it can also be used to limit the opening. When stopping use, the handwheel mechanism must be restored to the original neutral position to facilitate the normal operation of the automatic control system.
5. During installation, the flow direction of the medium should be consistent with the direction indicated by the valve body.
6. The pipeline should be cleaned of dirt and welding slag before installation. After installation, make it fully open, clean the pipeline, etc. and test the tightness of each connection.


Main technical indicators of pneumatic low-temperature double-seat control valve:

Nominal diameter
DN
Single seat
20
25 32 40 50 65 80 100 125 150 200
Two-seater

25 32 40 50 65 80 100 125 150 200
Limited Data
Coefficient Kv
Single seat
0.08 0.12 0.20 0.32 0.50 0.80 1.2 2.0 3.2 5.0 8 12 20 32 50 80 120 200 280 450
Two-seater

10 6 25 40 63 100 160 250 400 630
Flow characteristics
Straight line
Straight line; equal percentage
Equipped with actuator model


ZMA-2
ZMA-3
ZMA-4
ZMA-5
Journey
10
10
16
25
40
60
Mode of action
Air-closed (B), air-opened (K)
Spring pressure range KPa
Standard signal: 20~100; other signals; 40~200; 20~60; 60~100


Outline structure drawing:




Main dimensions:

Nominal diameter DN (mm)

20 25 32 40 50 65 80 100 125 150 200
A 230 280 280 325
410
495

135 235 235 255 280 310 345 370 430 470 550 660
1 160 260 260 285 305 340 375 405 460 525 590 700
2 190 290 290 315 335 370 410 440 490 560 630 740
n-d 6-12 8-14 8-14 8-14 8-16
10-16 10-18 12-18 16-18
20-18
Single seat
H
L 120 190 200 210 235 265 295 210 370 440 475 570
H1=500 862 1006 1060 1066 1137 1152 1377 1390 1394


H1=600 962 1106 1160 1166 1237 1252 1477 1490 1494


H1=700 1062 1206 1260 1266 1337 1352 1577 1590 1594 1743 1751 1790
H1=800 1162 1306 1360 1366 1437 1452 1677 1690 1694 1843 1851
H1=900 1262 1406 1460 1466 1537 1552 1777 1790 1794 1943 1951 1990
H1=1000 1362 1506 1560 1566 1637 1652 1877 1890 1894 2043 2051 2090
H1=1100








2143 2150 2190
H1=1200








2243 2250 2290
H2
32 58 112 118 129 144 178 191 195 243 251 290
Two-seater
H
L

200 210 235 265 295 320 370 440 475 570
H1=500

1065 1068 1147 1152 1387 1407 1419


H1=600

1165 1168 1247 1252 1487 1507 1519


H1=700

1265 1268 1347 1352 1587 1607 1619 1768 1778 1820
H1=800

1365 1368 1447 1452 1687 1607 1719 1868 1878 1920
H1=900

1465 1468 1457 1552 1787 1807 1819 1968 1978 2020
H1=1000

1565 1568 1647 1652 1887 1907 1919 2068 2078 2120
H1=1100








2168 2178 2220
H1=1200








2268 2278 2320
H2


117 120 139 144 188 208 208 268 278 320



Packing & Delivery : 

Packing Details:all by seaworthy plywood case and packed strongly by packing belt as below
Delivery Details:Generally it is 5-10 days if the goods are in stock. or15-30 days if the goods are OEM or not
enough subject to the order quantity. But anyway, normally, we are able to make sure the delivery will not exceed 45days.


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