Specification

NEWWAY Sealed Reliable Pressure Balanced Inverted Lubricated Oil Sealed Plug Valve

I. Product Overview

NEWWAY back pressure balanced lubricated plug valves are designed to strict API 599 and API 6D standards, integrating an inverted pressure balancing structure with a forced lubrication system for low-torque operation and bi-directional sealing under high-pressure conditions. Constructed with WCB cast steel or 304/316 stainless steel, these valves operate in media environments from -29℃ to 80℃, widely applied in rigorous fluid control scenarios across petrochemical, pharmaceutical, and power industries.

II. Key Attribute Parameters

Technical Specifications

Bore Range: DN25~DN350 (1″~14″)

Pressure Classes: Class 150~Class 900 (PN16~PN150)

Temperature Range: -29℃~80℃ (standard), customizable to -40℃~180℃

Design Standards: API 599, API 6D; Flange Standards ASME B16.5; Face-to-Face Dimensions ASME B16.10

Testing Standard: API 598 (shell strength and seal testing)

Material Configuration

Body/Bonnet: ASTM A216 WCB (cast steel), ASTM A351 CF8/CF8M (stainless steel)

Plug: ASTM A182 F6a (forged stainless steel), surface hardened (HV≥250)

Sealing System: Metal hard seal + PTFE auxiliary seal, lubrication passage in brass

Actuators: Manual (wrench/handwheel), worm gear, pneumatic, electric (optional)

Performance Parameters

Shell Test Pressure: 3.0/7.5/15.0/22.5MPa for Class 150/300/600/900

Seal Test Pressure: 2.2/5.5/11.0/16.5MPa (bi-directional zero leakage, API 598 Class VI)

Operating Torque: ≤120N·m for DN100 Class 150 valve (manual operation)