Pumps & Valves

Our engineers at BelleFlex® are experienced with Belleville applications for pumps, valves, and emission leakage control systems. Our flange bolting is used regularly in pumps and valves to help eliminate flange leakage caused by bolt stretch, gasket creep, and cycles of thermal change. Leakage is greatly reduced, if not eliminated by maintaining load on bolted joints. Many materials are available, such as H13 Tool Steel, 17-7 PH Stainless Steel, and INCONEL® 718 and X-750 Alloys.

Belleville disc springs are also important for good valve performance. “Live loading” is a method of using Bellevilles to preserve preload in valves. A Belleville is added to the gland follower of a packed valve to create a controlled, sustainable amount of stress in the packing set. Properly executed live loading that uses a BelleFlex® Belleville can greatly reduce the likelihood of mechanical failure.

For situations in which there is wide variation in temperature, BelleFlex® provides cryogenic flange bolting in a variety of materials for reducing leaks in cryogenic applications. We carry a large in-stock selection of flange bolting for cryogenic applications in materials with good cryogenic properties such as PH (precipitation hardening) and Carpenter Technology stainless steels.