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Pneumatic Single Seat Valve
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Pneumatic Single Seat Valve 3
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Pneumatic Single Seat control Valve

Air-actuated control valve for precise flow regulation of process fluids in industrial automation. Compact, hygienic design with tight shutoff — suited to low-leakage service and hygiene-critical industries such as pharmaceutical and food & beverage.

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Product Description

Top-guided design with a multi-spring actuator. Compact, lightweight, and responsive, with an S-flow streamlined flow path, low pressure drop, high flow capacity, and precise flow characteristics. Easy to install and service.

Controls gases and liquids to hold process parameters — pressure, flow, temperature, and level — at set point. Designed for low-leakage service at low differential pressure.

Features

  • Metal-seated plugs cover a wide range of services and meet Class IV leakage; soft-seated plugs meet Class VI.
  • Bellows-sealed bonnets fully enclose the stem to prevent fluid leakage.
  • Jacketed valves are specified where fluids crystallize, solidify, or block on cooling.
image 63

Basic Parameters

Nominal Diameter (DN): DN20～DN200
Operating Voltage: AC220V, AC380V, DC24V
Medium Temperature: -30℃-350℃
Ambient Temperature: -30℃～60℃
Nominal Pressure: 1.6～6.4MPa
Control Method: Switch or Proportional Regulation
Sealing Form: Stainless Steel Movable Hard Seal, STL Surfacing, PTFE, etc.

Physical Specifications

Material & Connection

Connection Method: Flange Connection, Threaded Connection, Welding
Valve Body Material: HT200, ZG230-450, ZG1Cr18Ni9Ti, SUS304, SUS316, WCB
Valve Core Material: 1Cr18Ni9Ti, Stellite Alloy Surfacing, SUS304, SUS316
Packing Material: Graphite, PTFE
Protection Grade: IP67

Applicable Medium

  • Petroleum
  • Neutral Liquid
  • Paper Pulp
  • Gas

Standards Compliance

Manufacturing Standard: JB/T8692-199
Design Standard: GB/T4213-92
Inspection Standard:
JB/T 9092 API598

Main Parameters

Nominal DiameterDN20～DN200
Operating Temperature-30℃-350℃
Nominal Pressure1.6Mpa, 4.0MPa, 6.4MPa
Air Supply Pressure0.14～0.4MPa
Applicable MediumNeutral liquid, petroleum, paper pulp, gas
Action ModeDirect action, reverse action
Diaphragm MaterialNitrile rubber reinforced with polyester fabric
Spring Range20～100KPa, 40～200KPa, 80～240KPa
Connection MethodFlange connection, threaded connection, welding
Control ModeOn-off or proportional regulation
Valve Body MaterialHT200, ZG230-450, ZG1Cr18Ni9Ti, SUS304 stainless steel, SUS316 stainless steel, WCB
Valve Core Material1Cr18Ni9Ti, Stellite alloy surfacing, SUS304 stainless steel, SUS316 stainless steel
Ball Valve SealStainless steel movable hard seal, STL surfacing, PTFE, etc.
Bellows Material1Cr18Ni9Ti
GasketRubber asbestos plate, asbestos spiral wound gasket
Corrugated DiaphragmNitrile rubber reinforced with polyester fabric
Spring60Si2Mn
Valve Stem, Push Rod2Cr13, 1Cr18Ni9Ti, 304, 316L
Bushing2Cr13
Packing MaterialGraphite, PTFE
Manufacturing StandardJB/T8692-199
Design and Manufacturing StandardGB/T4213-92
Product Inspection and TestJB/T 9092, API598

1.Overall Dimensions and Weight Dimension Drawings of Standard Type, Heat Dissipation Type, Bellows Seal Type and Jacket Insulation Type

气动单座阀尺寸图1

表一：

Nominal Diameter
DN (mm)		20253240506580100125150200
L PN16~40150160180200230290310350400480600
PN64~100206210230251286311337394450508650
H₂125125155155165200205210275330372
A×H₂ PneumaticΦ282*260Φ308*282Φ394*362Φ498*436
ElectricΦ225*370Φ255*500Φ310*700Φ310*750
H₃212212222226230335335345414456478
H₄326326394394398605605618688690708
C×H₅Φ220*180Φ270*240Φ320*315
Jacket Type Flange Specifications D₂4040506580100125150200250300
Weight (Kg) PN162021243337656856118145215
Weight (Kg) PN6423243244537681100156178265

2.Overall Dimensions and Weight of Low-temperature Type

气动单座阀尺寸图2

表二：

Nominal Diameter
DN (mm)		20253240506580100125150200
L、A×H2See Table 1
H1700
H39296115
ΦD1 PN16~40230230250270305342375430490556665
PN64~100270270305342375430492556665665765
ΦD2 PN16~40310310335355390430465520585660770
PN64~100355355390430465520585600770770890
h1212121212151515181818
PN16~40260260285305340370405460525590700
PN64~100305305340370405460525590700700805
PN16~40290290315335370400435490555630740
PN64~100335335370400435490555630740740845
D5Φ285Φ470Φ115
n-M8-M128-M1410-M1412-M1614-M1616-M1618-M16
C×H5Φ220×182Φ270×240Φ320×315
Weight (Kg)2425283645687388162176284

Documents & Drawings:

Single seated Control Valve
GRAT-Single-seated Control Valve Selection Catalog

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