Fine and Small Pneumatic Film Regulating Valve
Description:
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:
Nominal diameter mm | Twenty | Twenty-five | Forty | Fifty | Sixty-five | Eighty | One hundred | One hundred and fifty | Two hundred | Two hundred and fifty | Three hundred | Three hundred and fifty | Four hundred |
The seat diameter of MM | Ten | Twelve | Fifteen | Twenty | Twenty-five | Thirty-two | Forty | Fifty | Sixty-five | Eighty | One hundred | One hundred and twenty-five | One hundred and fifty | Two hundred | Two hundred and fifty | Three hundred | With the company Arrange production |
Rated flow The coefficient of Kv | straight line | One point eight | Two point eight | Four point four | Six point nine | Eleven | Seventeen point six | Twenty-seven point five | Forty-four | Sixty-nine | One hundred and ten | One hundred and seventy-six | Two hundred and seventy-five | Four hundred and forty | Six hundred and ninety | One thousand | One thousand and six hundred |
The percentage of | One point six | Two point five | Four | Six point three | Ten | Sixteen | Twenty-five | Forty | Sixty-three | One hundred | One hundred and sixty | Two hundred and fifty | Four hundred | Six hundred and thirty | Nine hundred | One thousand four hundred and forty |
Nominal pressure MPa | 0.6 1.6 4 6.4 |
Travel mm | Ten | Sixteen | Twenty-five | Forty | Sixty | One hundred |
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Flow characteristics | Linear, equal percentage, quick opening |
Medium temperature | -15 ~ 200 (Chang Wenxing), -40 ~ +250, -40 ~ +450 (medium temperature), -100 ~ +200 (low temperature) |
Flange size | Cast iron flange size by JB78, cast steel flange size by JB79 |
Flange form | With JB78-59, JB79-59, JB/79.1-94, JB/79.2-94, according to ANSI, JIS, DIN and other standard production orders |
body material | PN (MPa) | 0.6,1.6 | WCB (ZG230-450) CF3CF8 CF8M |
4.0,6.4 | WCB (ZG230-450), ZG1Cr18Ni9Ti, ZG0Cr18Ni12Mo2Ti CF8 CF8M |
The valve type | Through single seat casting ball valve |
Valve material | 1Cr18Ni9, 0Cr18Ni12Mo2Ti CF8 CF8M |
The valve cover form | Ordinary type (Chang Wenxing), hot chip (medium temperature) and low temperature type |
Can be equipped with accessories | The hand wheel locator electric / gas converter air filter regulator |
Adjustable ratio R | 30:1 |
Joint source | M16 * 1.5 |
Six, the main technical parameters of the actuator:
Model | ZHA (B) -1 | ZHA (B) -2 | ZHA (B) -3 | ZHA (B) -4 | ZHA (B) -5 | ZHA (B) -6 |
The effective area of cm2 | Two hundred | Two hundred and eighty | Four hundred | Six hundred and thirty | One thousand | One thousand and six hundred |
Travel mm | Ten | Sixteen | Twenty-five | Forty | Sixty | One thousand |
Spring range KPa | 20~100 (standard); 40~200; 80~240; 20~60; 60~100 |
Seven, allow pressure:
Air pressure MPa | Spring pressure KPa | Nominal diameter | Twenty | Twenty | Twenty | Twenty | Twenty-five | Thirty-two | Forty | Fifty | Sixty-five | Eighty | One hundred | One hundred and twenty-five | One hundred and fifty | Two hundred | Two hundred and fifty | Three hundred |
The seat diameter | Ten | Twelve | Fifteen | Twenty | Twenty-five | Thirty-two | Forty | Fifty | Sixty-five | Eighty | One hundred | One hundred and twenty-five | One hundred and fifty | Two hundred | Two hundred and fifty | Three hundred |
Zero point one four | 20-100 | Allowable differential pressure MPa | Five point three | Three point seven | Two point three | One point three | Zero point eight | Zero point five | Zero point five | Zero point three | Zero point two five | Zero point two | Zero point one two | Zero point one two | Zero point zero eight | Zero Point Zero Five | Zero Point Zero Five | Zero point zero three five |
Zero point two four | 40-200 | Six point four | Six point four | Five point five | Three point one | One point eight | One point two | One point one | Zero point seven | Zero point six five | Zero point four five | Zero point one eight | Zero point one eight | Zero point one zero | Zero point one zero | Zero point one zero | Zero point zero seven |
Eight, dimensions:
DN | D | PN (MPa) | H | H1 |
One point six | Four | Six point four | Room temperature | Medium temperature |
Twenty-five | Two hundred and eighty | One hundred and eighty-five | One hundred and ninety | Two hundred | Six hundred and eighty-five | Eight hundred and thirty-five | One hundred and fifteen |
Thirty-two | Two hundred and eighty | Two hundred | Two hundred and ten | Two hundred and ten | Six hundred and ninety-six | Eight hundred and forty-seven | One hundred and twenty |
Forty | Three hundred and twenty-five | Two hundred and twenty | Two hundred and thirty | Two hundred and thirty-five | Seven hundred and fifty-four | Nine hundred and five | One hundred and thirty |
Fifty | Three hundred and twenty-five | Two hundred and fifty | Two hundred and fifty-five | Two hundred and sixty-five | Seven hundred and eighty-four | Nine hundred and thirty-five | One hundred and forty-five |
Sixty-five | Four hundred and ten | Two hundred and seventy-five | Two hundred and eighty-five | Two hundred and ninety-five | One thousand and sixty-five | One thousand two hundred and nineteen | One hundred and eighty |
Eighty | Four hundred and ten | Three hundred | Three hundred and ten | Three hundred and twenty | One thousand and seventy-six | One thousand two hundred and thirty-nine | One hundred and ninety-five |
One hundred | Four hundred and ten | Three hundred and fifty | Three hundred and fifty-five | Three hundred and seventy | One thousand and eighty-five | One thousand two hundred and forty-eight | Two hundred |
One hundred and twenty-five | Four hundred and ninety-five | Four hundred and ten | Four hundred and twenty-five | Four hundred and forty | One thousand two hundred and eighty-six | One thousand four hundred and ninety-eight | Two hundred and forty-five |
One hundred and fifty | Four hundred and ninety-five | Four hundred and fifty | Four hundred and sixty | Four hundred and seventy-five | One thousand three hundred and six | One thousand five hundred and eighteen | Two hundred and fifty-five |
Two hundred | Four hundred and ninety-five | Five hundred and fifty | Five hundred and sixty | Five hundred and seventy | One thousand three hundred and eighty-one | One thousand five hundred and ninety-three | Two hundred and seventy-five |
Two hundred and fifty | Six hundred and twenty | Six hundred and seventy | Seven hundred and forty | Seven hundred and fifty-two | One thousand four hundred and fifty-five | One thousand six hundred and forty-five | Three hundred and eighty |
Three hundred | Six hundred and twenty | Seven hundred and seventy | Eight hundred and three | Eight hundred and nineteen | One thousand five hundred and ten | One thousand six hundred and ninety | Four hundred and thirty |
Nine, the material of main parts temperature range:
Part name | Material Science | temperature range |
valve body The valve cover | HT200 | -20 to 200 DEG C |
ZG230-450 | -40 ~ 450 C |
ZG1Cr18Ni9Ti | -250 ~ 550 C |
Valve, valve seat, valve stem | 1Cr18Ni9 | -250 ~ 550 C |
Under the diaphragm | A3 plate |
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Bracket, cover | HT200 |
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Compression spring | 60Si2Mn |
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Corrugated film | 5806 plastic clip 480D nylon 66 mesh cloth |
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filler | Teflon | -40 to 200 DEG C |
carbon fibre | -120 to 350 DEG C |
Flexible graphite | -40 to 600 DEG C |
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.