Control Valve

ZRD Type High Performance Adjustable Butterfly Valve

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



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Category : Control Valve. Tags : control valve, rotary actuator control valve

ZRD adjustment type butterfly valve (Pneumatic / Electric), adopting intelligent control, can adopt electric or pneumatic actuator to realize 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 partical ,fibre medium. It is suitable for automatic control system of food, environmental protective , light industry , petroleum , pepar marking, chemical , teaching and scientific research equipment, electric and other industry now.

adjustable 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.

adjustable butterfly valve Model Establishmen

Z Actuator R Structure type Nominal pressure Body material Nominal diameter
Z series control valve S:Pneumatic piston
J:pneumatic diaphragm
D:Electric  DTR series
R:Electric 3810 series
R Rotary D: 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

adjustable butterfly valve Performancen

Flow characteristic Approximate equal percentage
Adjustable range 50:1  
Rated CV figure  Full champter CV 85~20500
Travel Full open 90° Adjustment 0-70°
Allowance leakage Hard seal:IV(0.01% Valve rated volume) Soft seal:VI(Bubble classs)
intrinsic error % Pneumatic ±2 Electric ±2.0
Hystersis % Pneumatic ≤1.5 Electric ≤1.0
Dead zone % Pneumatic ≤0.6 Electric ≤1.0
Note :Parameters in performance sheet is based on the control valve with positioner and PTFE packing .

adjustable butterfly valve Selected parameter

Nominal diameter DN(mm) 50 65 80 100 125 150 200 250 300 350 400 450 500 600
Rated flow series Cv 85 180 240 390 690 1000 1760 3390 4730 6700 8900 10500 14800 20500
PTFE packing, metal seal allow different pressure Unit: MPa
Double action pneumatic actuator     1.45 0.54 0.79 0.42 0.34 0.1 0.27 0.17 0.12 0.19 0.11 0.04
Single action pneumatic actuator     0.82 0.38 0.5 0.44 0.33 0.19 0.38 0.16 0.14 0.14 0.12 0.11

adjustable butterfly valve Actuator

  Model/ Type Pneumatic piston actuator Full electric type electric actuator
At series  3810R series
Single action, double action Built-in control box type intelligent integration
Usage Adjustable, on-off Adjustable
Air supply pressure or supply electric voltage Supply gas pressure( spring scope) 400 Kpa G Power: AC 200V±10%  50Hz
Or power: AC 380V±10% 50Hz
Connector  Gas tube connector气管接头:RC1/4 Normal type:wire intake 2-PF(G1/2〞)
Exd: Installing protective sleeve PF(G3/4〞)
Direct action Gas pressure increase disk anti-clockwise rotaion,valve close Input signal increase disk anti-clockwise rotation, valve close
Re-action Gas pressure increase disk clockwise rotaion,valve open Input signal increase disk clockwise rotation, valve open
Input signal 40~20mA.DC(with electric pneumatic valve positioner) Input /output: 4~20mA.DC
lag ≤1%FS(with positioner) ≤0.8%FS
Linearity 2%FS(with positioner) +1%FS
Working temperature -10℃~+70℃ Standard: -10℃~+60℃
With spacer heating: : -35℃~+60℃
Exd: -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.

adjustable butterfly valve Standard material and inner structure

adjustable butterfly valve inner structure
Chart 1: Bodymaterial WCB
1 Body WCB LCB WC9
2 Bonnet WCB LCB WC9
3 Disc 304 304 304
4 Clamp ring 304 304 304
5 Gasket NBR/PTFE
6 Bearing 304 304 304
7 Bonnet WCB LCB WC9
8 Packing PTFE/Flexible graphite
9 Gland 304 304 304
10 Clamp WCB WCB WCB
12 Stem 304 304 304
13 Bolt 45 40MnB 25Cr2Mo1VA
14 Nut 35 35 25Cr2Mo1VA
Chart 2: body material Stainless steel
1 Body CF8 CF8M CF3M
2 Bonnet CF8 CF8M CF3M
3 Disc 304 316 316L
4 Clamp ring 304 316 316L
5 Gasket NBR/PTFE
6 Bearing 304 316 316L
7 Bonnet CF8 CF8M CF3M
8 Packing PTFE/Flexible graphite
9 Gland 304 316 316L
10 Clamp CF8 CF8M CF3M
12 Stem 304 316 316L
13 Bolt 304 316 316L
14 Nut 304 316 316L
  • Above is standard structure, seat is metal to metal, PTFE soft seat is VI seal option. We also provide STL coating strim.
  • Stardard body material is WCB and SS, We can provide many kinds alloy material to be used in high corrosive situation.