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Regulating valve

Regulating valve

ZSRF type pneumatic piston eccentric rotary valve

ZSRF type pneumatic piston eccentric rotary valve

Eccentric rotary valve is also called CAM deflection valve.

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Products Details

Eccentric rotary valve is also called CAM deflection valve.Eccentric rotary valve is actually a kind of arched truncated ball valve.Due to the existence of CAM eccentricity in the valve, the pneumatic device in the process of driving the valve closing parts from opening to closing, acting on the sealing force on the valve seat gradually increased, so that the spherical surface of the valve closing parts and the sealing surface of the valve seat from completely detached to contact,and gradually increase the specific pressure of the seal until it is completely sealed, and vice versa.This greatly improves the sealing state and sealing effect of the ordinary ball valve, and creates favorable conditions for the use of hard sealing materials (such as various metals and cemented carbide, etc.) on the ball valve, and opens up a path for the use of the ball valve in high temperature and high pressure to wear serious occasions.In addition, the valve because of the use of the bow - shaped ball and clip type connection, eliminating a pair of flanges, so light weight.In addition, the valve flow capacity is larger than the single seat and double seat type regulating valve, respectively, 50% and more than 20%.The valve has good regulating performance, and the flow characteristics are nearly linear (between equal percentage and linear).Therefore, eccentric rotary valve has been used as a large number of regulating valve use, but also as erosion resistance and abrasion resistance applied to solid materials and high temperature, high pressure occasions.

Specifications and technical parameters
Nominal diameter 25 40 50 65 80 100 125 150 200 250 300
Kv 12 30 58 75 120 190 300 480 930 1200 1900
Nominal pressure PN 6.4 MPa
Flow characteristics Straight line(output can also be chhanged from positioner to correction equal percentage)
Temperature℃ Normal temperature type:-20~180; Medium temperature type:-40~450
Allowable differential pressure 6.4 6.4 5.2 6.4 5.4 3.25 2.5 1.5 1.2 1.0 0.8
Leakage level Soft seal:grade VIHard seal grade IV. (GB/T4213-92)
Vlave core angle 50°
Air pressure 0.40~0.6 MPa

Material of main parts
Part name Material
Body ZG230-450; ZG1Cr18Ni9Ti
Shaft 2Cr13; 1Cr18Ni9Ti; 17-4PH
Spool ZG230-450; ZG1Cr18Ni9Ti
Seat Reinforced PTFE; 1Cr18Ni9Ti Surfacing stellite
Bracket ZG230-450
Packing PTFE; Flexible graphite

Main dimensions
DN A L H1 D D1 N-Ø H
25 255
100 70 140 100 4-18 250
32 115 80 155 110 4-23 250
40 115 85 170 125 4-23 290
50 125 90 180 135 4-23 290
65 377
143 105 205 160 8-23 350
80 165 110 215 170 8-23 350
100 195 130 250 200 8-24 420
125 403
210 150 295 240 8-30 460
150 230 150 345 280 8-32 480
200 245 160 405 345 12-32 510
250 300 240 470 400 12-38 620
300 616 340 270 530 460 16-38 700
Note:Flange standard:JB/T79-94,PN6.4MPa,Connection mode: Wafer(It can be specially manufactured according to user's requirements).

Packing & Delivery : 

Packing Details : all by seaworthy plywood case and packed strongly by packing belt as below

Delivery Details : Generally it is 5-10 days if the goods are in stock. or 15-30 days if the goods are OEM or not enough subject to the order quantity. But anyway, normally, we are able to make sure the delivery will not exceed 45 days.

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    If you are interested in our valves and want to know more details,please leave a message here,we will reply you as soon as we can.