Thetrunnion mounted DBB ball valve has two floating seats with springs loaded, inwhich the trunnion ball is fixed at two pivot points, and the process pressurepushes the upstream seat against the ball's sealing surface. This designapplies continuous pressure against a trunnion mounted ball after the ball isinstalled. The trunnion mounted ball valve is one kind of widely used oiland gas industry valves.

API 6D DBB ball valve usually designed with 3pcs forged steelbody construction. The API 6D DBB ball valve with two balls in one pc ballvalve body to achieve a positive sealing in a compact design. The familyof API 6D trunnion mounted ball valve is classified into 3pcs forged bodytrunnion valve, 2pcs cast steel body trunnion ball valve, and one pcforged body top entry trunnion ball valve. The one pc forged body top entrytrunnion ball can avoid the leaking risk from the connection between bodyand closure. The other advantage of top entry ball valve design is it makes theemergency on-line maintenance to be easier and quicker, because the valve ballneedn’t to be removed from pipe line. The 3pcs forged steel trunnion type ofball valves are most widely used trunnion ball valve of oil and gas industryvalves because it's reliability and economy.


Basic Design: API 6D, ASME B16.47

Face to Face: ASME B16.10, API6D

Flange Ends: ASME B16.5, ASME B16.47

BW Ends: ASME B16.25

Pressure Test: API 6D, API 598

Fire Safety: API 607, API 6Fa

Design Feature:

1pc Forged Steel Body, Two Balls Inside, Twin Balls Inside

Trunnion Mounted Ball

Blow-out Proof Stem

Anti-Static Device

Fire Safety Design

Emergency Sealant Injector

DBB, DPE, SPE, Double Blook and Bleed.

Size Range: 2" to48"

Pressure Class: Class150 to Class 2500


Body: A105N, LF2, F304, F316, F51

Ball: A105N+ENP, LF2+ENP, F304, F316, F51

Shaft: A105N+ENP, LF2+ENP, F304, F316, 17-4PH



Lever, Gear, Pneumatic Actuator


Stem Extension, 3mm Thickness SS316 Overlay Seat Pocket

Lockable Device, AED O-Ring, NACE MR 01-75

Inorganic Zinc Painting, Carboline