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Stainless Steel Instrumentation Control Valves Self Operated Pressure Regulating

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Stainless Steel Instrumentation Control Valves Self Operated Pressure Regulating

China Stainless Steel Instrumentation Control Valves Self Operated Pressure Regulating supplier
Stainless Steel Instrumentation Control Valves Self Operated Pressure Regulating supplier Stainless Steel Instrumentation Control Valves Self Operated Pressure Regulating supplier Stainless Steel Instrumentation Control Valves Self Operated Pressure Regulating supplier

Large Image :  Stainless Steel Instrumentation Control Valves Self Operated Pressure Regulating

Product Details:

Place of Origin: China
Brand Name: LINUO
Model Number: Self-operated pressure regulating valve

Payment & Shipping Terms:

Minimum Order Quantity: 1 set
Price: Negotiable
Packaging Details: Wooden packing
Delivery Time: 5-30 days upon order quantity
Payment Terms: T/T, Western Union, MoneyGram
Supply Ability: 50 set / 30 days
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Detailed Product Description
Material: Stainless Steel DN: DN20~300
PN: PN16, 40, 64 Pressure Section: 15~ 2500Kpa

Self-operated pressure regulating valve

Stainless Steel Instrumentation Control Valves Self Operated Pressure Regulating

General

  Using the energy of the medium to be adjusted as the power source to introduce the position of the actuator to control the spool and without external energy, ZZY series self-operated pressure regulating valve change the pressure difference and flow at both ends to stabilize the pressure before the valve (or after the valve). Therefore, it has the advantages of sensitive action, good sealing performance and small fluctuation of pressure set point. It is widely used in the automatic control of gas, liquid and vapor medium Decompression stabilization or pressure stabilization for pressure relief.

  This series of products has three structures: single seat (ZZYP), sleeve (ZZYM) and double seat (ZZYN); the actuator has two types: diaphragm type and piston type; function types include pressure regulation after pressure relief valve (type B) and pressure regulation before pressure relief valve (type K). The nominal pressure rating of the product is PN16, 40, 64; the valve body diameter range is DN20~300; the leakage level has II grade, IV grade and VI grade; the flow characteristic is quick opening; the pressure section is adjusted from 15~ 2500Kpa. Can be combined as needed to meet user requirements.

 

Feature

  Self-operated pressure regulating valve does not need external energy, and can work in an electric-free and gas-free place, which is convenient and energy-saving. The pressure subsection range is fine and cross each other, and the adjustment precision is high. Pressure setting values can be set continuously during operation. The ratio of pre-valve pressure to post-valve pressure can be 10:1~10:8 for pressure regulation after the valve. Rubber diaphragm type detection is adopted, and the actuator has high measurement accuracy and sensitive action. The pressure balancing mechanism is adopted to make the control valve sensitive and precise.

 

Main part material

Part Name Material
Valve body WCB,ZG1Cr18Ni9Ti,ZG0Cr18Ni12Mo2Ti
Spool 1Cr18Ni9Ti,0Cr18Ni12Mo2Ti
Valve seat 1Cr18Ni9Ti,0Cr18Ni12Mo2Ti
Valve stem 1Cr18Ni9Ti,0Cr18Ni12Mo2Ti
Rubber diaphragm Nitrile, Ethyl, Fluorine, Oil Resistant Rubber
Membrane cover A3/A4 steel coated with tetrafluoroethylene
Packing PTFE, flexible graphite

 

Specifications and technical parameters

Nominal diameter DN 20 25 32 40 50 65 80 100 125 150 200 250 300
Rated flow coefficient(KV) 7 11 20 30 48 75 120 190 300 480 760 1100 1750
Rated stroke(mm) 8 10 14 20 25 40 50 60 70
Nominal pressure PN(MPa) 1.6,4.0,6.4
Pressure adjustment range(KPa)

15~50 40~80 60~100 80~140 120~180 160~220 200~260

240~300 280~350 330~400 380~450 430~500 480~560 540~620

600~700 680~800 780~900 880~1500 1000~2500

Flow characteristics Quick opening
Adjustment accuracy(%) ±5
Temperature(℃) -40~350
Allowable leakage Hard seal(l/h)

Single seat:≤10-4 Valve rated capacity(IV class);

Double seat: ≤10-3 Valve rated capacity(III class)

Soft seal(ml/h) 0.15 0.30 0.45 0.60 0.90 1.7 4.0 6.75 11.10 16.0
Decompre-ssion ratio Maximum 10
Minimum 1.25

 

Pressure Regulation Range Regulation

  The range of pressure regulation is divided into sections. See the table of main parameters and performance indicators. The control pressure should be as close as possible to the middle value of the range of pressure regulation.

The relationship between the front pressure of the valve and the back pressure of the valve

  Self-operated control valve itself is a control system, and the valve itself has certain pressure drop requirements, for the back pressure control valve (type B). In order to ensure that the pressure behind the valve is within a certain range, the pressure before the valve must reach a certain value. The requirements can be referred to in the table below.

Determination of the Operation Mode of the Whole Machine

  The self-operated regulating valve (K-type) is a regulating valve for controlling the pressure in front of the valve. Its initial position of the spool is in the closed position. When the pressure in front of the valve increases gradually, the valve opens gradually until the pressure in front of the valve is stable at the required given value.

  Self-operated pressure regulator (B-type) is a regulator to control the pressure behind the valve. Its initial position of the spool is in the open position. When the pressure behind the valve increases gradually, the valve closes gradually until the pressure behind the valve is stable at the required given value.

 

Pressure adjustable range(KPa)

pre-pressur post pressure pre-pressur post pressure
30 15-24 650 65-520
50 15-40 700 70-560
100 15-80 750 75-600
150 15-120 800 80-640
200 20-160 850 85-680
250 25-200 900 90-720
300 30-240 950 95-760
350 35-280 1000 100-800
400 40-320 1250 125-1000
450 45-360 1500 150-1200
500 50-400 2000 200-1600
550 55-440 2500 250-2000
600 60-480 3000 300-2400
 

Shape size and weight

Stainless Steel Instrumentation Control Valves Self Operated Pressure Regulating

Nominal diameter DN 20     25 32     40 50 65     80 100 125 150 200 250 300
Flange connector size B 383 512 603 862 1023 1380 1380 1800 2000 2200
Flange face distance L 187  184 200  222 254 276  298 352 410 451 600 673 737

pressure

Adjustment

Range

(Kpa)

15-140 H 475 520 540 710 780 840 880 915 940 1000
A 280 306  
280-500 H 455 500 520 690 760 800 870 880 900 950
A 230
120-300 H 450 490 510 680 750 790 860 870 890 940
A 176 194 280
480-1000 H 445 480 670 740 780 850 860 880 930
A 176 194 280
600-1500 H 445 570 600 820 890 280 1000 1100 1200
A 85 96
1000-2500 H 445 570 600 820 890 950 1000 1100 1200  
A 85 96
Weight kg 26 37 42 72 90 114 130 144 180 200 250
Pressure pipe joint thread M16x1.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: The flange distance L of the above table is ZZYP (M) PN16 size. The flange standard is in accordance with the technical requirements.

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