Control Valve

ZQP Type Stop Valve

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Category : Control Valve. Tags : control valve, shutoff valve

ZQP stop valve (Pneumatic / Electric), has simply structure, easy operation , small volume, light weight, good seal, large flow, reliability using and so on. Disk can use single action or sleeve to adopt stop need under different pressure drop .It can choice big push pneumatic piston actuator or electric actuator.

stop valve Specification

Body type: Straight casing ball type body
Disk type: Single plug or balance sleeve
Nominal diameter: DN20—300 , NPS 3/4’’—8’’
Nominal pressure: PN16—100 Class 150LB—600LB
Connection: flange : FF. RF. RTJ
Weld : SW. BW
Face to face: Confirm to IEC 60534
Bonnet type : Standard (-5℃~230℃), radiation pin (-45℃~230℃). Low temperature extend (-196℃~ -45℃),Bollow seal, insulating clamp mode.
Packing: V type PTFE, Flexible graphite
Seal gasket: Metal+graphite
Actuator: Pneumatic : multi spring diaphragm actuator, piston actuator
Electric : 3810 series intelligent electric actuator, PSL actuator
Surface painting: Green color, acrylic acid polyurthene ceramic paint.

stop valve Code

Z Actuator Q Structure type Nominal pressure Body material Nominal diameter
Z series stop valve H:pneumatic piston
J:pneumatic diagragm
R:Electric 3410 series
D:Electric PSL series
Q stop valve P: standard single seat type
PF: soft seal single seat type
PG: wigh radiation single type
PV: bollow single seat type
PD: low temperature single seat M:standard sleeve type
MF: soft seal sleeve type
MG: with radiation sleeve type
MV:bollow sleeve s type
MD: low temperature sleeve type
CL150LB=150 LB
DN25= DN25
Such as: Z type pneumatic diaghragm stop valve, PN16, Body material:WCB, nominal diameter:DN50, Type is ZJQP-16C DN50

stop valve Performance

Flow characteristic Quick open
Allowable leakage Hard seal: IV Class (0.01% valve rated volume)  Soft seal: VI class ( bubble class) Leakage stardard: GB/T 4213
Note>: parameter in performance is with positioner and PTFE packing control valve

stop valve Special specification

Special test Material body penetration inspection (PT), radiographic inspection (RT), Flow feature test, low temperature test
Special treatment Trim nitrogen treatment , Seal coating hard alloy treatment
Special clean completely forbidden oil, removing water treatment
Special specification Special piping or special air connector, vaccume use condition, fastener adopt stainless steel, Special coating
Special size Produce according to user's structure length or dimension
Authentication test Third party authenticate test report

stop valve Actuator

Model / Type Piston acturator Full electronic type electric actuator
LVP80~LVP300 3410L series
Single piston/Double piston On-off
Usage On-off On-off
Supply gas pressure or supply voltage Air supply pressure
Power : AC 200V±10%  50Hz
Or AC 380V±10% 50Hz
Connector Air tube adapter : RC1/4 Normal type : Cable intake 2-PF(G1/2〞)
Exd type: it can be installed protective sleeve
Input signal 40~20mA.DC (E/P positioner) Input/putout4~20mA.DC
Ambient 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 Filtration reducing valve ,solenoid valve,limited switch Spacer heater (Normal  type)

stop valve Parameter

Nominal diameter(DN) 20 25 32 40 50 65 80 100 125 150 200
Travel(mm) 16 25 40 60
Thrust of pneumatic actuator
80 125 170 250
1900 4500 8450 18000
Pneumatic diagragm actuator
Effective diaphragm area Ae (cm2)
ZHA/B-22 ZHA/B-23 ZHA/B-34 ZHA/B-45
350 350 560 900
Thrust of electric actuator
3410L-20 3410L-50 3810L-65 3810L-160
2000 5000 6500 16000

stop valve Selected Standard type material and inside struction

Chart1: Body WCB 
Seat 304 304 304
Disk 304 304 304
Gasket 316+ graphite /PTFE
Bushing 304 304 304
Bonnet WCB LCB WC9
Packing PTFE/Flexible graphite
Bushing 304 304 304
Stem 304 304 304
Bolt 45 40MnB 25Cr2Mo1VA
Nut 35 35 25Cr2Mo1VA
stop valve Internal structure Chart 2: Body S.S
Body CF8 CF8M CF3M
Seat 304 316 316L
Disk 304 316 316L
Gasket 316+ graphite /PTFE
Bushing 304 316 316L
Bonnet CF8 CF8M CF3M
Packing PTFE/Flexible graphite
Bushing 304 316 316L
Gland CF8 CF8M CF3M
Bolt 304 316 316L
Bolt 304 316 316L
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. We will be more reasonable to choice bolt and nut for detail applicable temperature.
  • PTFE V type ring packing is standard configuration, could be instead of flexible graphite. One extend length bonnet installing graphit can be used in over 232℃ condition.
  • Except WCB and SS, We can provide many kinds alloy material to be used in high corrosive situation