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
PN16=16
CL150LB=
150 LB
C=WCB
LC=LCB
P=CF8
PL=CF3
R=CF8M
RL=CF3M
D= Special
material
DN50= DN50
NPS2〞=NPS2〞
Example: Pneumatic piston eccentric rotary control valve,pressure PN16, Body material WCB, Nominal diameter DN50, Model: ZSRP-16C DN50

Performance

Flow characteristic Approximation percentage
Adjustment scope Full chamber type 100:1    Shrinkage chamber type 40:1
Rated CV Full chamber type CV 14~1750   Shrinkage chamber type CV 6-700
Travel Full open 60°
Allowable leakage Hard seal: IV(0.01% valve rated capacity), soft seal: VI(Bubble level)
Intrinsic error % Pneumatic type ±2 Electric-type ±2.0
Hysteresis % Pneumatic type ≤1.5 Electric-type ≤1.0
Dead zone% Pneumatic type ≤0.6 Electric-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) 25 40 50 65 80 100 125 150 200 250 300
Rated flow coefficient Cv Full chamber type 14 30 55 100 135 230 320 500 850 1300 1750
Shrinkage chamber type 6 12 20 40 54 92 128 200 340 520 700
Double action pneumatic actuator Air supply pressure 400KPa
Model Torque(N.M) PTFE packing, metal seal allow differential pressure
ATD63 23.5 2.35 0.94                  
ATD75 46.5 5.0 2.84 1.49 0.57 0.33            
ATD88 73.2     2.39 0.99 0.62            
ATD100 106       1.54 0.99 0.30 0.19        
ATD125 221           1.29 0.80 0.39      
ATD160 453           2.84 1.79 0.89 0.47 0.26 0.14
Single action pneumatic actuator Air supply pressure 400KPa
Model torque(N.M) PTFE packing, metal seal allow differential pressure
ATS75 26.5 0.19                    
ATS88 44 1.19 0.09                  
ATS100 60.7 3.97 1.59 0.81 0.11              
ATS125 126     2.19 0.89 0.59            
ATS160 269         1.39 0.53 0.34        
ATS200 467           2.84 1.79 0.89 0.47 0.26 0.14
Electric actuator  
Model Torque(N.M) PTFE packing, metal seal allow differential pressure
3810R-10 100 10 7.5 4.0                
3810R-30 300       5 4.5 2.3 2.1 1.9      
3810R-50 500                 1.0 0.6 0.4

Actuator

Model/Style Pneumatic piston actuator Full electronic type electric actuator
AT Series 3810R Series
Single action, Double action Built-in control box type intelligent integration
Usage Adjustment, on-off Adjustment
Air supply pressure or supply voltage Air supply pressure ( spring scope)
400 Kpa G
Power: AC 200V±10%  50Hz
Or power: AC 380V±10% 50Hz
Connector Air tube adapter: RC1/4 Normal type: Cable intake 2-PF(G1/2〞)
Exd: it can be installed protective sleeve PF(G3/4〞
Direct action Gas pressure increase disk anti-clockwise rotation, valve close Input signal increase disk anti-clockwise rotation, valve close
Reaction Gas pressure increase disk clockwise rotation, valve open Input signal increase disk clockwise rotation, valve open
Input signal 40~20mA.DC(with E/P positioner) Input/putout4~20mA.DC
Lag ≤1%FS(with positioner) ≤0.8%FS
Linearity 2%FS(with positioner) ≤+1%FS
Working temperature -10℃~+70℃ Standard type: -10℃~+60℃
With spacer heater: -35℃~+60℃
Exd type: -10℃~+40℃
Coating Green, acrylic polyurethane enamel Blue, acrylic polyurethane enamel
Option parts Electric-Pneumatic (Pneumatic-pneumatic)valve positioner,LFT,Valve position transmitter,solenoid valve,limited switch Space heater (normal type)
Note: Not standard configuration, need to be stated before order.
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