What is ZHD Series (Electric/Pneumatic) Minimum Flow Control Valve (control valve)?
ZHD series (electric/pneumatic) minimum flow control valve is a multi-stage cage symmetrical orifice sleeve flow channel control valve, completely control the flow rate of the medium flowing through the valve, greatly reduce the noise generated by high pressure gas or steam in the valve, stable multi-level pressure relief effectively makes the liquid does not produce cavitation, is used in high pressure medium place stable performance control valve. Multi-spring pneumatic film mechanism or electric actuator can be selected.
Technical parameters and performance
| Valve body type | Straight casting ball valve |
| Nominal diameter | DN20 、25 、32 、40 、50 、65 、80 、100 、200 |
| Nominal pressure | PN 1.6、2.5、4.0、6.4、10、16、25Mpa |
| CLASS 150、300、600、900、1500Lb | |
| Connection mode | 法兰 FF、RF、RTJ、等 焊接：SW、BW |
| Executive mechanism | Pneumatic: multi-spring actuator |
| Electric: 3810L series, PSL series | |
| Spool type | Multistage cage sleeve |
| Flow characteristic | Equal percentage, linear |
Type compilation
| Z | R：Electric 381 series | HStraight stroke | D:Multistage cage sleeve | -16： PN1.6Mpa | C：Carbon steel | DN 20 口径20mm | |
| P：Electric PS Series | P：Chromium nickel titanium steel | ||||||
| J：Pneumatic film | -150LB： CL 150LB | I：Chrome-molybdenum steel | -B：air-tight | IN 1〞 口径1〞 | |||
| H：Straight stroke cylinder | V：Chromium molybdenum vanadium steel | -K：Air to open |
Flow characteristics equal percentage, linearvb
| Valve body | type | Direct connection | bonnet | type | Standard, elongated |
| material | WCB、WC9、304、316等 | material | WCB、WC9、304、316等 | ||
| Valve core | peculiarity | Straight line, equal percentage, fast open | filler | “V”型PTFE、 Flexible graphite, bellows | |
| material | 304、304+STL/PTFE、316、316+STL/PTFE | ||||
| localizer | Electric valve positioner, intelligent digital positioner | ||||
| attachments | Solenoid valve, valve position feedback device, hand operation mechanism, holding valve, air filter pressure reducer, etc | ||||
| The body material is carbon steel | ||||
| 1 | base | 25 | LF2 | F22 |
| 2 | nut | 25 | 35 | 25Cr2Mo1VA |
| 3 | bolt | 35 | 40MnB | 25Cr2Mo1VA |
| 4 | gasket | 316+石墨/PTEF | ||
| 5 | Valve body | 25 | LF2 | F22 |
| 6 | Valve seat | 304 | 304 | 304 |
| 7 | Valve stem | 304 | 304 | 304 |
| 8 | bolt | 35 | 40MnB | 25Cr2Mo1VA |
| 9 | nut | 25 | 35 | 25Cr2Mo1VA |
| 10 | gasket | 316+石墨/PTEF | ||
| 11 | Packing pad | 304 | 304 | 304 |
| 12 | filler | PTFE/柔性石墨 | ||
| 13 | bonnet | 25 | LF2 | F22 |
| 14 | Pressing sleeve | 304 | 304 | 304 |
| 15 | gland | 25 | LF2 | F22 |
| 16 | bolt | 35 | 40MnB | 25Cr2Mo1VA |
| 17 | nut | 25 | 35 | 25Cr2Mo1VA |
| Table 3. The body material is stainless steel | ||||
| 1 | base | CF8 | CF8M | CF3M |
| 2 | nut | 304 | 316 | 316L |
| 3 | bolt | 304 | 316 | 316L |
| 4 | gasket | 316+石墨/PTEF | ||
| 5 | Valve body | CF8 | CF8M | CF3M |
| 6 | Valve seat | 304 | 316 | 316L |
| 7 | Valve stem | 304 | 316 | 316L |
| 8 | bolt | 304 | 316 | 316L |
| 9 | nut | 304 | 316 | 316L |
| 10 | gasket | 316+石墨/PTEF | ||
| 11 | Packing pad | 304 | 316 | 316L |
| 12 | filler | PTFE/柔性石墨 | ||
| 13 | bonnet | CF8 | CF8M | CF3M |
| 14 | Pressing sleeve | 304 | 316 | 316L |
| 15 | gland | CF8 | CF8M | CF3M |
| 16 | bolt | 304 | 316 | 316L |
| 17 | nut | 304 | 316 | 316L |
