Full Welded Body 1 Pieces Ball Valve Steel 20 Soft Seat For Gas

Steel 20 High Pressure Soft Seat Full Welded Body 1 Pieces Ball Valve For Gas

Applications

Isolating valve for maintenance-free above- and below-ground installations in pipelines, on compressor stations and platforms.
Min. temperature range -60°C to +50°C
Standard temperature range -29°C to +50°C
Max. temperature range -29°C to +160°C

Features & advantages

Upstream Sealing At low pressure, seat-to-ball contact is maintained by Belleville springs. At higher pressures, seat contact is reinforced by line pressure.

Automatic Internal Relief of Body Pressure Relief of excess body cavity pressure is automatic, avoiding dangerous pressure buildup. Any pressure exceeding downstream line pressure by approximately 200 psi pushes the downstream seat away from the ball, allowing the pressure to relieve into the pipeline.

Rotating Seat Rings The exclusive rotating seat feature is standard in the teko fully welded ball valve sizes 14” (350 mm) and larger. Both seats rotate 15 degrees each time the valve is closed, exposing a new pinch point and evenly distributed seat wear

The pinch point is the area of the seat insert that experiences an increased velocity when the valve is seated closed and unseated open. This is where the seat seal experiences the most wear, and in most valves, where a leak path begins. By rotating the seat ring, the pinch point wear is distributed throughout the seat seal, providing an increase in seat life.

Low-torque Operation

Regardless of size or pressure rating, every teko fully welded ball valve is trunnion mounted. High-strength forged stems are located in PTFE impregnated stainless steels bearings for smooth operation. Trunnion mounted stems absorb the thrust from line pressure, preventing excess friction between the ball and seats, so even at full rated working pressure, operating torque stays low.

Double Block-and-bleed

Whether in the fully open or fully closed position, pressure on each side of the ball is blocked from the body cavity by the seat ring. The body cavity can then be bled down or drained through the body port. When you block-and-bleed a teko fully welded ball valve, the following can be accomplished: