Fine and Small Pneumatic Film Regulating Valve

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Fine and small pneumatic film regulator is a new generation of actuator developed by our company wit…

A brief introduction:
ZJHP/HM seriesFine small pneumatic diaphragm control valveI absorb domestic and foreign advanced technology development in line with the IEC standard for a new generation of multi spring actuator, by adjustable zero actuator and low flow resistance, no sleeve cover single seat control valve.The volume ratio of 1/3, the weight ratio of 1/3, large flow capacity 1/3, low center of gravity, good shock resistance, convenient installation; performance than similar products, equivalent to the foreign CV3000 series valve, widely used in chemical, petroleum, light industry, power plant, metallurgy and other industrial automatic control system.
Two, structure principle:
ZJHP/HM seriesFine small pneumatic diaphragm control valveAccept the standard electric signal regulator (by electro pneumatic positioner or electro pneumatic converter) control signal output pressure, changing the valve opening, to change the flow of media to be transferred, the parameters of flow, pressure, temperature and liquid level adjustment, the realization of the production process automation.External pneumatic pressure signal input film chamber, the pressure on the diaphragm to produce thrust, the thrust compression spring group, and the push rod to move and drive the stem to the valve open (close), anti thrust and force balance until the spring group is compressed and stable in a certain position on the trip so far.In accordance with the above principle, the spool displacement and input pressure signal in a certain proportion.
Three,Fine small pneumatic diaphragm control valveThe material of main parts:
1, valve body, valve cover: HT200, ZG230-450, ZG1Cr18Ni9Ti;
2, valve, valve seat: 1Cr18Ni9Ti welding division Stellite alloys;
3, soft sealing valve: ptfe;
4, packing: PTFE, flexible graphite;
5, bellows: 1Cr18Ni9Ti;
6, gasket, asbestos rubber sheet, asbestos gasket, 1Cr18Ni9Ti, 10;
7, film cover: A3;
8, corrugated diaphragm: NBR rubber clip reinforced polyester fabric;
9, spring: 60SIMN;
10, valve rod, push rod: 2Cr13, 1Cr18Ni9Ti;
11, Bush: 2Cr13.
Four, install the valve in general should consider the following aspects:
1, security personnel: the installation process and equipment safety.
2, control performance: the pressure loss of pipe system should be consistent with the pressure loss calculation parameters when considering the flow characteristics in order to ensure the required.Import and export should ensure that sufficient straight pipe.
Location: 3, should have sufficient space to facilitate the operation of the operator (including bypass operation) and ensure the possibility of regulating valve and accessories and maintenance of in situ disassembly.
Before 4, the electric control valve installed in the pipeline, the pipeline should remove dirt, dust, rust and other welding of foreign material, so as not to run the seizure and damage to the valve core and the valve seat; the valve and the valve body should be consistent with the direction of medium flow indicator installation.
5 group: control valve, shut-off valve and bypass valve is usually installed in the process piping, and regulating valve with the valve group in order to adapt to the continuous operation of the equipment.Repair the valve, with shut-off valve isolation, the bypass valve adjustment.Figure 3 recommended a regulating valve layout.The dashed box said control valve.
Fifth, specifications and technical parameters:

Six, the main technical parameters of the actuator:

Seven, allow pressure:

Eight, dimensions:

Nine, the material of main parts temperature range:

Design selection and ordering information:
1, nominal diameter * seat diameter;
2, nominal pressure and flange connection type;
3, the valve body and the valve component materials, surface hardening requirements;
4, the valve cover type;
5, flow characteristics;
6, actuator type, gas pressure;
7, valve type (gas - gas - closed or open);
8, annex (locator, hand wheel, valve etc.);
9, special requirements, no oil, no copper etc.;
10, medium;
11, the normal flow and maximum flow;
12, medium pressure, inlet pressure and the outlet pressure of the maximum flow and minimum flow;
13, medium temperature and proportion;
14, medium viscosity, containing suspension.