Pneumatic Control, Inc. | Products | Ball Valves | Worcester

Series WK-70 Tube Bore Clean Valves
Forged Stainless Steel Ball Valves for high-purity and aseptic processes.

A clean valve to write your specs around:
Tube bore, metallurgy, surface finish, shutoff, cleanability and automation.

Series WK-70 clean valves operate dependably in the pharmaceutical, biotech, food, cosmetics paint, chemical and semi-conductor manufacturing industries where microbes, media deposits, mineral impurities and cross -contamination can threaten the quality of the product.

The high-purity
design, high vacuum rating, high cycle life and pressure/temperature rating of these valves make them ideal for applications from sterile steam to nutrient inlets to high purity water. The performance of WK-70 tube bore clean valve is based on a combination of high standard specifications.

Tube Bore
The inside diameter of WK-70 valve components are tube bore dimensions so the valve precisely matches the tubing it is connected to. This prevents buildup of pyrogens or bacteria.

Forged Valve
WK-70 valves are built of forged parts. From an integrity perspective, forgings are better than castings for clean service because they are stronger, free from crevices, pits, shrinks or inclusions and have better controlled metallurgy.

Low Ferrite Content
WK-70 valves are made of 316L stainless with a guaranteed ferrite content of less than 5%. This prevents rouging resulting from minerals and impurities drawn from higher ferrite content metals.

High Integrity Welds
The metallurgy of WK-70 body and extended tube ends assures the integrity of the orbital welding. The tube ends have a verifiable sulfur content between .005% and .016%. Too much sulfur causes a lack of penetration of the orbital welding. With a low sulfur content comparable to that of the process tubing, the quality of the weld is assured.

High Cycle Sealing
Bubble-Tight Shutoff Seats of TFE, Reinforced TFE and Polyfill® provide bubble-tight shutoff through the valve, even under conditions of high-vacuum and high cycle operation. High cycle stem seals assure external sealing when the valve is automated.

Steam Service Capability
Polyfill is a TFE material with carbon and graphite fillers with excellent high temperature properties. These standard seats are capable of up to 275 working steam pressure (WSP) making the WK-70 valve ideal for sterile steam applications.

3"- 4" Series 45 Clean Valves
Worcester's clean valves are optionally available in 3" and 4" sizes with TC Quick Disconnect and XBO ends through our Custom Products Department.