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Fort Vale

1.5" BSP Uniact Relief Valve

Fort Vale 1.5" BSP Uniact Relief Valve — Pressure/vacuum relief for tank protection.

Components & Design

Component data being added…

Technical Data

Size DN40 (1.5" BSP)
Model VAS373
Setting 40 PSI (2.8 Bar) typical
Type Uniact pressure/vacuum
Material 316 Grade Stainless Steel

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Common failures & inspection points

Poppet and valve seat face sealing integrity - Check for wear, corrosion pits, or scratching that could prevent leak-tight sealing at 90% MAWP reseat pressure

Visual inspection of poppet and seat sealing surfaces under magnification; seat leakage test at 80% MAWP

Alloy 625 crevice corrosion at union of sealing face and main valve seal - Risk particularly at seal crevices in corrosive cargo applications

Examine seal crevice area and valve seat for discoloration, pitting, or deposits indicating crevice corrosion initiation

External corrosion, erosion, or physical damage to valve body or actuator - Can prevent safe operation of both manual and pneumatic/hydraulic valves

External visual inspection of valve casting, threads, and actuating mechanisms for corrosion products, erosion, or distortion

Pressure relief valve reseating and opening pressure drift - Valve must open at MAWP ±10% and reseat at minimum 90% MAWP

Pressure relief test using calibrated test rig at no less than 80% MAWP and no more than 110% MAWP opening

Piping connections and secondary closure valves for leaks - Manifold integrity depends on all secondary closure points remaining leak-free

Leakage test with product piping at 80% MAWP with all valves and accessories in place; all self-closing stop valves tested for tightness

Type-general inspection and maintenance points for this equipment category — not model-specific.

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Equipment Model #150148 · ✓ still in production