The ZY-ZJHP/M precision small pneumatic thin film sleeve regulating valve adopts a top guide structure and is equipped with a multi spring actuator. It has the advantages of compact structure, light weight, sensitive action, S-shaped fluid channel, low pressure drop loss, large valve capacity, precise flow characteristics, and easy disassembly and assembly. Widely used for precise control of process parameters such as gas and liquid media to maintain pressure, flow rate, temperature, and liquid level at given values. Especially suitable for situations where the allowable leakage is small and the pressure difference before and after the valve is not significant.

The main features are as follows:

1. Adopting a balanced valve core, it allows for a large pressure difference and stable operation under unbalanced forces.

2. The large guiding surface of the valve core can improve the oscillation caused by eddy currents and impacts.

3. Reduce noise by about 10dB compared to ordinary single or double seat regulating valves.

4. The structure is simple and easy to assemble, disassemble, and maintain.

■ Valve body

Type: Straight through single seat cast ball valve

Nominal diameter: 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300mm

Nominal pressure: PN1.6、4.0、6.4MPa

Flange standard: JB/T79.1-94、 79.2-94, etc

Materials: cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti), etc

Upper valve cover: standard type -17~+230 ℃, heat dissipation type+230~+450 ℃, low temperature type -60~-196 ℃, bellows seal -40~+350 ℃

Cover type: bolt compression type

Packing: V-shaped PTFE packing, PTFE impregnated asbestos packing, asbestos textile packing, graphite packing

Structural forms: standard type, heat dissipation type, low-temperature type, corrugated pipe sealing type, insulation jacket type, and fluorine lined type (see Figure 1-5)

■ Valve components

Valve core type: pressure balanced valve core

Traffic characteristics: equal percentage characteristics and linear characteristics

Materials: Stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L), stainless steel overlay with Stellite alloy, titanium, and corrosion-resistant alloys.

■ Executing Agency

Type: Multi spring thin film actuator

Spring range: 20-100 (standard), 40-200, 80-240, 20-60, 60-100KPa

Membrane material: Nitrile rubber with nylon cloth, Ethylene propylene rubber with nylon cloth

Gas supply pressure: 140-400KPa

Gas source interface: RC1/4'

Environmental temperature:- 30～+70℃

■ Valve action type

Gas closed type (B) - valve position open when gas is lost (FO); Pneumatic opening (K) - valve position closed when gas is lost (FC)

■ Attachment

Positioner (HEP type, YT1000 type), air filter pressure reducer, holding valve, travel switch, valve position transmitter, handwheel mechanism, etc