Eccentric rotary control valve

What is a eccentric rotary control valve?

ZRP eccentric rotary valve ( CAM deflection control valve), consisted of the actuator and eccentric rotary valve, is a kind of angle trip control valve which composes with partly ball valve plate deflection, eccentric rod rotary to control building. Rotary center of valve disk not concentric with a rotary rod can reduce wear and prolong service life. Disk back set a contra-vane is an advantage for field stability flow and good stable. Secondly, large flow, adjustment scope wide and other features. It is used widely in petroleum, chemical, electric, metallurgy, steel, papermaking, medical, food, spinning, light industry, and other industry.

Pneumatic Eccentric Rotary Control Valve
Pneumatic Eccentric Rotary Control Valve
Electric Eccentric Rotary Control Valve
Electric Eccentric Rotary Control Valve

Standard Specification

Body type:Straight casing eccentric ball type valve
Spool type:Eccentric bow globe ball body
Nominal size:DN50 ~300 NPS 2〞~12〞
Nominal pressure:PN16 ~40 CLASS 150LB ~300LB
Connection: flange:FF, RF, RTJ, Wafer type and so on.
Bonnet type:Whole type
Packing:V type PTFE, Flexible graphite
Seal gasket:Metal+graphite
Actuator:Pneumatic : pneumatic piston actuator, pneumatic diagragm actuator
Electric:DTR series, 3810 series
Surface painting:Green color, acrylic acid polyurthene ceramic paint.

Model Establishment

ZActuatorRStructure typeNominal pressureBody materialNominal diameter
Z series control valveS: pneumatic piston
J: pneumatic diagragm
A: Electric DTR series
R: Electric 3810 series
R RotaryP:Standard full cavity rotary
PF: Soft seal eccentric Rotary
RP: reduced chapter eccentric rotary
150 LB
D= Special
DN50= DN50
Example: Pneumatic piston eccentric rotary control valve,pressure PN16, Body material WCB, Nominal diameter DN50, Model: ZSRP-16C DN50


Flow characteristicApproximation percentage
Adjustment scopeFull chamber type 100:1    Shrinkage chamber type 40:1
Rated CVFull chamber type CV 14~1750   Shrinkage chamber type CV 6-700
TravelFull open 60°
Allowable leakageHard seal: IV(0.01% valve rated capacity), soft seal: VI(Bubble level)
Intrinsic error %Pneumatic type ±2Electric-type ±2.0
Hysteresis %Pneumatic type ≤1.5Electric-type ≤1.0
Dead zone%Pneumatic type ≤0.6Electric-type ≤1.0
Note: Parameters in the performance sheet is based on the control valve with positioner and PTFE packing.

Selected parameter

Nominal diameter DN(mm)2540506580100125150200250300
Rated flow coefficient CvFull chamber type14305510013523032050085013001750
Shrinkage chamber type61220405492128200340520700
Double action pneumatic actuatorAir supply pressure 400KPa
ModelTorque(N.M)PTFE packing, metal seal allow differential pressure
ATD8873.2  2.390.990.62      
ATD100106   1.540.990.300.19    
ATD125221     1.290.800.39   
ATD160453     2.841.790.890.470.260.14
Single action pneumatic actuatorAir supply pressure 400KPa
Modeltorque(N.M)PTFE packing, metal seal allow differential pressure
ATS125126  2.190.890.59      
ATS160269    1.390.530.34    
ATS200467     2.841.790.890.470.260.14
Electric actuator 
ModelTorque(N.M)PTFE packing, metal seal allow differential pressure


Model/StylePneumatic piston actuatorFull electronic type electric actuator
AT Series3810R Series
Single action, Double actionBuilt-in control box type intelligent integration
UsageAdjustment, on-offAdjustment
Air supply pressure or supply voltageAir supply pressure ( spring scope)
400 Kpa G
Power: AC 200V±10%  50Hz
Or power: AC 380V±10% 50Hz
ConnectorAir tube adapter: RC1/4Normal type: Cable intake 2-PF(G1/2〞)
Exd: it can be installed protective sleeve PF(G3/4〞
Direct actionGas pressure increase disk anti-clockwise rotation, valve closeInput signal increase disk anti-clockwise rotation, valve close
ReactionGas pressure increase disk clockwise rotation, valve openInput signal increase disk clockwise rotation, valve open
Input signal40~20mA.DC(with E/P positioner)Input/putout4~20mA.DC
Lag≤1%FS(with positioner)≤0.8%FS
Linearity2%FS(with positioner)≤+1%FS
Working temperature-10℃~+70℃Standard type: -10℃~+60℃
With spacer heater: -35℃~+60℃
Exd type: -10℃~+40℃
CoatingGreen, acrylic polyurethane enamelBlue, acrylic polyurethane enamel
Option partsElectric-Pneumatic (Pneumatic-pneumatic)valve positioner,LFT,Valve position transmitter,solenoid valve,limited switchSpace heater (normal type)
Note: Not standard configuration, need to be stated before order.
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