Valve body
| Type |
Casting or steel plate welding |
| Valve size |
DN50~1000 |
| Rated pressure |
PN6 |
| Connection type |
Clamp type, flange type |
| Flange standard |
Steel flanges according to GB9113-2000, JB/T79-94 |
| Materials |
ZG230-450, ZG1Cr8Ni9T, ZG1Cr18Ni12M02T |
| Structural form |
inclined plate (no eccentricity, see figure) |
| Cover type |
pressure plate type |
| Packing |
V-shaped polytetrafluoroethylene packing, flexible graphite packing |
| Gasket |
Type, tooth profile and flat profile; Material, F4/modified F4, stainless steel+graphite |
Actuator
| Type |
Multi-spring thin-film actuator
ZHA-22, ZHA-23
ZHA-34, ZHA-45 |
| Valve function |
Gas closed, gas open |
| Corner |
600 |
| Membrane material |
Nitrile rubber clip reinforced polyester fabric |
| Spring range |
20~100KPa, 40~200KPa, 20~60KPa, 60~100KPa |
| Gas supply pressure |
0.14-0.25MPa |
| Environmental temperature |
-30 ℃~+70 ℃ |
| Type |
Pneumatic piston actuator (ZSC-45) |
| Valve function |
Double-acting (double cylinder) |
| Corner |
600 |
| Gas supply pressure |
0.4~0.6 MPa |
| Signal interface |
Internal thread M16×15 |
| Environmental temperature |
-20 ℃+90 ℃ |
Valve components
1. Valve plate: inclined sealing surface
2. When the valve plate is in the closed position, there is an initial angle of 100 degrees
3. Seat: Same as the valve body
Valve function (taking pneumatic diaphragm adjustment butterfly direction as an example)
Air shut-off FO (valve shut-off bracket)
When the gas source fails, the actuator spring opens the valve
Gas closed FC (gas distribution open bracket)
When the gas source fails, the actuator spring closes the valve
Attachment (dosage according to requirements)
Positioner, air filter pressure reducing valve, handwheel mechanism, limit switch,Electromagnetic valve, valve position transmitter, relay, holding valve, others
Performance
| Rated Kv value |
Refer to Table 1 |
| Traffic characteristics |
Approximately equal percentage |
| Adjustable range |
30:1 |
| Valve seat leakage rate (for rated Kv value%) |
Metal seal: less than 0.5% (ANSI B16.104-197611 grade)
Less than 0.01% or 0.001%
(ANSI B16.104-19761V Class) |
| Return difference |
Less than 1% of the full stroke (with locator)
Less than 3%~5% of the full journey (without locator) |
| Basic error |
Less than ± 1% of the full stroke (with locator)
Less than ± 5% of the full travel (without locator) |
| Dimensions |
Refer to Table 2 |
| Product weight |
Refer to Table 2 |
| Paint color |
The pneumatic actuator of the regulating valve and the surface of the valve should be painted, while stainless steel and copper valves may not be painted.
The arrows and text on the valve body are painted red.
Users can also specify colors. |
