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Pneumatic three-way regulating valve product description
ZJHF(H) pneumatic diaphragm three-way regulating valve is composed of a multi-spring pneumatic diaphragm actuator and a three-way split (combined) valve body. Pneumatic film actuators have the advantages of low height, light weight, large flow capacity, and easy installation and maintenance. Pneumatic three-way regulating valve is equipped with electro-pneumatic valve positioning or pneumatic valve positioner, which can realize automatic adjustment and control of fluid medium in process pipeline. It is widely used in precise control of process parameters such as pressure, flow rate of gas, liquid, steam and other media. Parameters such as temperature, level, etc. are maintained at a given value.
Pneumatic three-way control valve spool structure uses a cylindrical thin-walled window, and the use of valve side guide. The valve body has a three-way structure, ie, one in and two out (split type), two in and one out (combined type), so as to achieve fluid mixing heating or cooling, or fluid flow in different amounts, to meet the requirements of different industrial and mining use. Pneumatic three-way control valve body has the advantages of compact structure, light weight, sensitive operation, low pressure drop loss, large valve capacity, precise flow characteristics and easy maintenance. Pneumatic three-way regulating valve is used for proportional regulation or bypass regulation. It is especially suitable for the adjustment of the fluid temperature control system of oil industry heat exchangers. A three-way valve can replace two single-seat valves or two-seat valves and occupy space. Small size saves installation piping and costs.
| Nominal diameter(DN) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| Valve seat diameter(dn) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| Rated flow coefficient(KV) |
Diverter valve | 6.3 | 8.5 | 13 | 21 | 34 | 53 | 85 | 135 | 210 | 340 | 535 | 800 | 1360 |
| Confluence valve | - | - | - | - | - | - | 85 | 135 | 210 | 340 | 535 | 800 | 1360 | |
| Allowable pressure difference(MPa) | 3.5 | 3.2 | 2.2 | 2.2 | 1.4 | 1.38 | 0.94 | 0.61 | 0.51 | 0.36 | 0.2 | 0.19 | 0.13 | |
| Nominal pressure(MPa) | 1.6、2.5、4.0、6.4、10.0 | |||||||||||||
| With actuator type | ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 | |||||||||
| Rated route(mm) | 16 | 25 | 40 | 60 | 100 | |||||||||
| Valve cover form | standard type(-17～+250℃)、High temperature type(+250～+450℃)、Low temperature type(-40～-196℃)、Bellows sealed type(-40～+350℃) | |||||||||||||
| Capping form | Bolt compression type | |||||||||||||
| Seal packing | V type PTFE packing、V type flexible graphite filler | |||||||||||||
| Valve body material | Cast Steel (WCB), Stainless Steel (CF8, CF8M, CF3, CF3M), Chrome Molybdenum Steel, Cast Steel Backing PTFE (WCB+F46) | |||||||||||||
| Valve core form | Double guide sleeve double valve core |
| Flow characteristics | Linear, equal percentage |
| valve core material | stainless steel (304、316、316L) |
| Configure Actuator Category |
ZHA/B Multi-spring film actuator | ||||
| Actuator model | ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 |
| Effective area(cm2) | 350 | 350 | 560 | 900 | 1400 |
| route (mm) | 10、16 | 24 | 40 | 40、60 | 100 |
| Spring range(KPa) | 20～100（standard）、20-60、60-100、40-200、80-240 | ||||
| Diaphragm material | Nitrile rubber clip nylon cloth, ethylene propylene rubber clip nylon cloth | ||||
| Air supply pressure | 140～400KPa | ||||
| Air interface | RC1/4" | ||||
| Ambient temperature | -30～+70℃ | ||||
| equipped with accessories | Locator, air filter pressure reducer, position valve, route switch, valve positioner, handwheel mechanism, etc. | ||||
| Form of action | Air-to-close (B)—Valve open (FO) when deaeration; Air-opening (K)—Valve off (FC) when deaeration | ||||
| Item | Without positioner | With positioner | ||
| Basic error % | ±5.0 | ±1.0 | ||
| Backlash % | ≤3.0 | ≤1.0 | ||
| dead zone % | ≤3.0 | ≤0.4 | ||
| Starting to end point deviation % |
Air open | Starting point | ±2.5 | ±1.0 |
| Starting point | ±5.0 | ±1.0 | ||
| Air shut | Starting point | ±5.0 | ±1.0 | |
| end point | ±2.5 | ±1.0 | ||
| Rated route deviation % | ≤2.5 | |||
| Leakage L/h | 0.01%× Valve rated capacity | |||
| Adjustable range R | 50：1 | |||
