Fig. 275LK

Verify hydrostatic test certificate at 1.5x MAWP (maximum allowable working pressure). For PN 16 models minimum 24 bar body test and 17.6 bar seat test required. Test documentation must be present and dated within certification validity period

Inspect disc and seat materials match cargo type specifications. Bronze discs (Fig. 275-1276 series) for general marine cargoes; stainless steel (Fig. 3250-3251) for chemical/corrosive cargoes. Verify PTFE packing is asbestos-free and check for degradation signs (discoloration, brittleness) after operating temperature exposure

For flanged models (Fig. 275-276, 1271): verify DIN PN 16 flange faces are flat, undamaged, and properly aligned with no corrosion pitting exceeding 0.5 mm depth. For threaded models (Fig. 1275-1276, 3250-3251): inspect BSP female threads for cross-threading marks, stripping, or seizing. Test with appropriate gauge plug/ring

Operate handwheel with calibrated torque wrench: verify rising stem responds to rotation (1-3 mm per full rotation for globe valves per ISO 10497), no binding, and handwheel rotates freely. Verify PTFE gland packing is not leaking (dry to touch) and stem moves without excessive friction. Check for corrosion or pitting on stem exterior

Verify manufacturer nameplate with model designation (Fig. 275, 1275, 3250, etc.), pressure/temperature ratings match installation. Confirm compliance markings for maritime classification (Lloyd's Register, DNV, ABS, Classnk) and compliance with IMO/EU-MED standards. Check that serial number and date of manufacture are legible and documented