Swing Check Valve, Tee Body, 3 in × 150# RF, 285 psi, Sour Service

The Swing Check Valve, Tee Body, 3 in × 150# RF, 285 psi, Sour Service is a swing te check valve rated for 285 psi working pressure (ANSI 150 class) with 3 in 150# ANSI Raised-Face Flange inlet and 3 in 150# ANSI Raised-Face Flange outlet. NACE MR0175 / ISO 15156 sour-service compliant.

Tee-body swing-disc design — one inlet leg and a perpendicular outlet leg, with a hinged disc on the inlet path. Used at frac iron junctions where flow combines into a manifold trunk. The tee body absorbs reaction loads cleanly, and the disc seats on the inlet face when reverse flow occurs in the trunk.

Construction

• Type: Check — Swing — Swing TE
• Nominal size: 3 in
• Bore: Full Port
• Body material: Cast WCB carbon steel — NACE MR0175 compliant
• Trim (disc/dart + seat): 316SS disc + 316SS seats
• Seal / elastomer: RPTFE seats + Viton (FKM) O-rings
• Inlet: 3 in 150# ANSI Raised-Face Flange
• Outlet: 3 in 150# ANSI Raised-Face Flange

Performance

Working pressure 285 psi. Hydrotested at 1.5× working pressure (shell test); seat-tested per API 6D acceptance criteria. NACE MR0175 / ISO 15156 sour-service compliant — H₂S-rated trim and elastomers, material class EE.

Installation

Install with the flow arrow on the body matching line direction. For swing types, horizontal-with-cover-up is the preferred orientation; vertical-flow-up is also supported. Avoid vertical-flow-down installation (the disc fights gravity to close).

Applications

• Sour-gas vent headers
• Drain manifolds (sour)
• 150# utility process service
• Tank-farm ingress lines (sour)

Compliance

• API 6D N/A N/A
• Material class EE (API 6A chemistry / sour-service grading)
• NACE MR0175 / ISO 15156 (sour-service)
• Mill test reports per EN 10204 3.1 / 3.2

How to order

Confirm (a) line working pressure and pressure class, (b) inlet and outlet end-connection sizes / styles, (c) service class (standard vs sour), (d) installation orientation (especially for dart-type — vertical-flow-up only), and (e) any flow-velocity or noise constraints (over-spec'd swing checks can chatter at low flow). Indus quotes ex-Dubai for stock items and ex-works OEM for build-to-order items, with full mill test reports and pre-shipment hydrotest certificates.

Companion products

Pair with matched-pressure ball valves, plug valves, gate valves, and SSV/ESDs of the same end-connection family. For frac iron service trees, the 1502/602/206 Weco unions are the matched standard. For wellhead and Christmas tree service, the API 6A 5M/10M/15M flanged geometries pair check valves with master and wing gate valves.