High Performance Adjustable Butterfly Valve

What is a High Performance Adjustable Butterfly Valve ?

ZRD Type High-Performance Adjustable Butterfly Valve, adopting intelligent control, can adopt an electric or pneumatic actuator to realize the adjustment of pressure, flow, temperature, liquid level. It has compact structure, strong function, small volume, good seal, good performance, simply assort, large flow and other features to be suited for slabby, including partial, fiber medium. It is suitable for the automatic control system of food, environmental protective, light industry, petroleum, paper marking, chemical, teaching, and scientific research equipment, electric and other industries now.

Pneumatic Adjustment Type Butterfly Valve
Pneumatic Adjustment Type Butterfly Valve
Electric Adjustment Type Butterfly Valve
Electric Adjustment Type Butterfly Valve

Standard Specification

Body type:Flat casting molding
Disk type:Triple eccentric butterfly
Nominal diameter:DN50 ~600 NPS 2〞~24〞
Nominal pressure:PN16—64 Class 150LB
Connection: flange:Flange, Wafer
Bonnet type:Whole piece
Packing:V type PTFE, Flexible graphite
Seal gasket:Metal clip graphite
Actuator:Pneumatic : Pneumatic: Pneumatic piston actuator, pneumatic diaphragm actuator
Electric: DTR series, 3810 series
Electric:DTR series, 3810 series
Surface painting:Green color, acrylic acid polyurthene ceramic paint.

Model Established

ZActuatorRStructure typeNominal pressureBody materialNominal diameter
Z series control valveS: Pneumatic piston
J: pneumatic diaphragm
D:Electric DTR series
R: Electric 3810 series
R RotaryD: Standard type
hard seal adjustment
DF: Soft seal
150 LB
D=Special material
DN50= DN50
Such as Pneumatic piston hard seal adjustment butterfly valve, Pressure PN16, Body material WCB, Nominal diameter DN100.Type is ZSRD-16C DN100


Flow characteristicApproximate equal percentage
Adjustable range50:1
Rated CV figure Full chapter CV 85~20500
TravelFull open 90° Adjustment 0-70°
Allowance leakageHard seal: IV(0.01% Valve rated volume) Soft seal: VI(Bubble classs)
intrinsic error %Pneumatic ±2Electric ±2.0
Hysteresis %Pneumatic ≤1.5Electric ≤1.0
Dead zone %Pneumatic ≤0.6Electric ≤1.0
Note: Parameters in the performance sheet are based on the control valve with positioner and PTFE packing.

Selected parameter

Nominal diameter DN(mm)506580100125150200250300350400450500600
Rated flow series Cv85180240390690100017603390473067008900105001480020500
PTFE packing, metal seal allow different pressure Unit: MPa
Double action pneumatic actuator  1.450.540.790.420.340.
Single action pneumatic actuator  0.820.380.50.440.330.190.380.


  Model/ TypePneumatic piston actuatorFull electric type electric actuator
At series 3810R series
Single action, double actionBuilt-in control box type intelligent integration
UsageAdjustable, on-offAdjustable
Air supply pressure or supply electric voltageSupply gas pressure( spring scope) 400 Kpa GPower: AC 200V±10%  50Hz
Or power: AC 380V±10% 50Hz
Connector Gas tube connector:RC1/4Normal type: wire intake 2-PF(G1/2〞)
Exd: Installing protective sleeve PF(G3/4〞)
Direct actionGas pressure increase disk anti-clockwise rotation, valve closeInput signal increase disk anti-clockwise rotation, valve close
Re-actionGas pressure increase disk clockwise rotation, valve openInput signal increase disk clockwise rotation, valve open
Input signal40~20mA.DC(with electric pneumatic valve positioner)Input /output: 4~20mA.DC
lag≤1%FS(with positioner)≤0.8%FS
Linearity2%FS(with positioner)+1%FS
Working temperature-10℃~+70℃Standard: -10℃~+60℃
With spacer heating: -35℃~+60℃
Exd: -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 ordering.
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