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GKSP3000/4000 Self-Operated Pressure Regulating Valve is a spring set direct acting universal pressure regulating valve. It can be widely applied to various low corrosive gases and low viscosity liquids. Choosing the corresponding configuration can achieve upstream pressure control and downstream pressure control. The minimum control pressure is 3KPa, the maximum control pressure is 3600 KPa, the minimum operating temperature is -48 ℃, and the maximum operating temperature is 300 ℃.
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GKV3000/4000 Industrial Control Valve – High Precision, Long Life & Reliable Pressure Control
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Size Range 1/2" – 8" (DN15 – DN200), custom sizes available |
Body & Bonnet Material Carbon Steel: ASTM A216 Gr. WCC |
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Temperature Range NBR: -29°C ~ +82°C |
Stem / Shaft Material Carbon Steel Bodies: 17-4 PH SS
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Working Pressure Up to 725 psi (50 bar), ANSI Class 150, 300, 600 (per B16.34)
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Seats & Seals Hard Seat: Standard metal sealing |
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Packing & Gland PTFE/Kevlar (285 K asbestos-free), GRAFOIL optional |
Trim / Plug Materials 316 SS, Stellite #6, hardfaced seat options |
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Actuator Compatibility Diaphragm or Bellows Type, Modulating or On-Off |
Flow Direction Flow to Open or Flow to Close |
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Special / Optional Materials Nitronic 50, Copper-free alloy, NACE-compliant materials |
End Connection Standards Flanged: ANSI 150, 300, 600; Weld Ends SW/BW; Wafer |
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Design Standards ANSI B16.34, ANSI B16.47, API 598, IEC 534, GB/T 12237 |
Applications Industrial, chemical, and high-temperature fluid control systems |
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Safety Features Blow-out proof stem, backup bellows seal, overload protection, oxygen-clean and oil-free options |
Trim Types & Flow Capacity Single-seat or Cage-type plug; Rated Cv values per table; Linear, Equal % or Quick Open |
Characteristics of GKSP3000/4000 Self operated Pressure Regulating Valve

Easy Assembly – The modular design allows quick conversion between
upstream and downstream pressure control with minimal part replacement,
covering various pressure and temperature ranges.
Overload Safety – Equipped with an overload protection mechanism, the
valve can safely withstand pressures several or even dozens of times higher
than the set range, ensuring safety under extreme conditions.
Reliable Sealing – A long bellows stem combined with a backup sealing ring
ensures excellent stem sealing performance.

High Accuracy – The low-friction bellows design and optimized spring-actuator system deliver high control precision across operating pressures.
Low Leakage – The single-seat valve provides minimal leakage, while the soft-seated version achieves complete shutoff for reliable pressure holding.
Balanced Plug Design – The O-ring balanced structure minimizes pressure differential effects, improving stability and control accuracy.
The unique design of GKV3000/4000 self operated pressure regulating valve

Modular Design for Flexible Pressure Control
Universal modular structure enables upstream and downstream pressure regulation with minimal part replacement, covering a wide range of pressures and temperatures.
Safety & Overload Protection
Unlike conventional self-operated regulators, this valve features an overload protection mechanism that safely withstands pressures several times above the maximum range.
Reliable Bellows Stem Sealing
Long bellows stem with backup seals ensures minimal leakage and reliable operation under demanding conditions.
Low Friction & High Accuracy
Optimized springs and actuator design, combined with low-friction bellows stem, deliver precise pressure control.
Tight Shut-off
Single-seat soft-seated plug ensures minimal leakage and complete fluid shut-off, maintaining system pressure reliabl