The seats are of both-side-sealing type, which means that they seal both on the upstream or downstream side of the ball valve and inside the valve. Whether in the open or closed position, pressure on each side of the ball is blocked from the body cavity by the seat rings engineered to self relieve. No pressure build up can occur in to body cavity. The body cavity can then be vented to the atmosphere or drained through the body port.

Sealant Fitting

Sealant lubrication fittings come as a standard with design. In the event of seat insert or stem seal damage, external or internal leakage can occur. Emergency sealant injection can save the integrity of the valve by incorporating a sealant seal around the stem or between the seat and the ball until such time the valve may be properly serviced.

Antistatic Device

The springs provided at the stem allow the static charges to be led to the piping. In this way, an electrostatic charging of the ball is eliminated. Stem Seal with Blow Out Proof Stem The stem is independent of the ball and is a blow-out proof design. As an integral part, a stem has a flange at its lower side. The stem flange prevents the stem from blowingout. This feature also allows replacement of stem packing while the valve is under pressure.The torque is transmitted to the ball by a generously proportioned mating joint, hence the stem is not affected by the side thrust.