pneumatic diaphragm three valve dual spool upper and lower guide structure, equipped with multi spring actuator, valve for the four structures, namely one into two (shunt), two into a (confluent), so as to achieve the fluid mixing heating or cooling effect, or fluid from a shunt, meet the requirements of different conditions. The valve has the advantages of compact structure, in a light, sensitive action, small pressure drop loss, allowing the pressure high, new capacity is big, flow valve is accurate and convenient maintenance and so on, can be used in a variety of working conditions, temperature automatic control system and other industry control is especially suitable for the oil industry in the heat exchanger.
The valve has closed (divided) flow type, (points) flow high temperature type and other types of. Product nominal pressure level of a user PN1.6, 4, 6.4; the valve nominal diameter range of DN25~400; leakage class II grade, IV grade; flow is characteristic for linear and equal percentage. A variety of different specifications are available.
Materials of main parts
| Name | Texture of material |
| The valve body | ZG230-450,ZG0Cr18Ni9 |
| Valve seat | 0Cr18Ni9, 0Cr18Ni9+PTFE, 0Cr18Ni9+ division Chatterley |
| The valve stem | 0Cr18Ni9,2Cr13 |
| The push rod | 0Cr18Ni9,2Cr13 |
| Spring | 60Si2Mn |
| Bellows | 0Cr18Ni9 |
Corrugated diaphragm | Clip reinforced nylon fabric nitrile rubber |
Film cover | A3,0Cr18Ni9 |
Shim | 0Cr18Ni9, graphite spiral wound gasket (V6590), F4 |
Filler | PTFE, flexible graphite |
The main technical parameters of the three-way valve
| All diameter. | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| Seat diameter mm | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| Rated KV | 8.5 | 13 | 21 | 34 | 53 | 85 | 135 | 210 | 340 | 535 | 800 | 1280 | 1960 | 2560 |
| Nominal pressure (MPa) | 1.6,2.5,4.0,6.4 | |||||||||||||
| Trip(mm) | 16 | 25 | 40 | 60 | 100 | 130 | ||||||||
The effective area of the film Ae (cm2) | 280 | 350 | 560 | 900 | 1400 | plug | ||||||||
| Signal range KPa | 20-100,40-200,80-240 | |||||||||||||
| Air pressure MPa | 0.1-0.4 | 0.4-0.7 | ||||||||||||
| The inherent flow characteristics | Linear, equal percentage, quick opening | |||||||||||||
| The inherent adjustable ratio | 30:1 | |||||||||||||
| The leakage class | III,IV | |||||||||||||
| Flange size | According to JB/79. (2) _94, HG20592_97, GB, ANSI, JIB, DIN and other standards | |||||||||||||
| Body material | WCB, 304, 316, WC6, nickel, titanium, Hastelloy, Monel etc. | |||||||||||||
| Valve material | 304, 316, 420, nickel, titanium, Hastelloy, Monel etc. | |||||||||||||
| Working temperature ℃ | -40~+230 ℃ (room temperature), +230~+450 ℃ (temperature), +450~+560 ℃, -40~-196 ℃ (high temperature) (low) | |||||||||||||
| Series type | At room temperature, medium temperature, low temperature type. Bellows seal type, jacket type heat, regulating off type | |||||||||||||
