WCB CF8 Pneumatic Diaphragm Three-Way Combined Flow Control
Regulating Valve
Product introduction:
The SZJHQ pneumatic diaphragm three-way combined flow control valve and the SZJHX pneumatic diaphragm three-way diversion control valve, which adopts a cylindrical thin-walled window shaped valve core guidance,
different from the sleeve guidance of the plunger shaped valve
core. Equipped with a multi spring actuator, it has the advantages
of simple structure, light weight, small volume, and convenient
disassembly and assembly. Widely used in processes for precise
control of gases, liquids, and other media, such as maintaining
pressure, flow rate, temperature, and liquid level at given values.
Suitable for dividing a fluid into two streams through a three-way
valve or merging two fluids into one fluid through a three-way
valve.
There are two types of pneumatic diaphragm three-way regulating valves: three-way combined flow and three-way
split flow. The nominal pressures include PN16, 40, and 64; The
nominal diameter range is DN25-300. The applicable fluid
temperature ranges from -60 ℃ to+450 ℃. The leakage standard is
level IV. There are two types of flow characteristics: straight and
parabolic.
Product technical parameter:
| DN(mm) | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
Rate flow coefficient
Kv | Merge | 8.5 | 13 | 21 | 34 | 53 | 85 | 135 | 210 | 340 | 535 | 800 | 1280 |
| Diverge | | | | | | 85 | 135 | 210 | 340 | 535 | 800 | 1280 |
| Rate stroke L(mm) | 16 | 25 | 40 | 60 | 100 |
| Effective area of membrane Ae(cm2) | 280 | 400 | 600 | 1000 | 1600 |
| Pressure nominal PN(MPa) | 1.6, 4.0, 6.4 |
| Inherent flow characteristics | Linear and Parabola |
| Inherently adjustable ratio R | 30:1 |
| Working temperature T(℃) | Normal type: Cast steel -40～250, Stainless steel -60～250
Heat dissipation type: Cast steel-40～450, Stainless steel
-60～450 |
| Temp. difference between two media(℃) | Cast steel and stainless steel ≤200 |
| Signal range Pr(kpa) | 20～100 |
| Air source pressure Ps(MPa) | 0.14～0.4 |
| Allowable leakage l/h | 10-4×Rated valve capacity |
| Allowable pressure difference △P(MPa) | 0.86 | 0.75 | 0.48 | 0.31 | 0.27 | 0.18 | 0.11 | 0.12 | 0.09 |
Product features:
Pneumatic diaphragm regulating and control valve is a widely used
regulating equipment in the field of industrial automation, with
advantages such as compact structure, high adjustment accuracy,
easy operation, and good stability. It uses compressed air or
nitrogen gas as the power source to drive the opening and closing
of the diaphragm control valve, achieving precise control of
parameters such as flow rate and pressure of the fluid medium and
its features as below,
1. Compact design and light weight, easy to disassemble and repair,
and can be installed in any position.
2. The structure is simple and compact, with a 90 ° rotation for
quick opening and closing.
3. Low operating torque, labor-saving and lightweight.
4. Achieve complete sealing and zero gas test leakage.
5. Choosing different component materials can be applied to various
media.
6. The flow characteristics tend to be linear, and the regulation
performance is good.
7. The number of opening and closing tests can reach up to ten
thousand times, with a long service life.
8. All pipelines that use gate valves, globe valves, plug valves,
hose valves, and diaphragm valves, especially in high-rise building
fire protection systems and pipeline systems that require display
of valve on/off status, can be replaced with this valve.
