Global industrial player, Pentair Valves & Controls, has announced the launch of two new Keystone Global Resilient (GR) seated heavy-duty industrial valves aimed at general-purpose applications. Available in lug (GRL) and wafer (GRW) body styles, the new valves offer longer cycle life and a lower total cost-of-ownership through increased reliability and performance.
Based on an upgraded global design, the new valves offer a host of benefits, including a proprietary Pentair polymer seat for increased pressure holding capabilities and decreased wear. The result is a higher performing, longer lasting and more reliable valve that delivers lower total-cost-of-ownership. Other advanced features include higher pressure ratings, blow out resistant shafts, for increased safety of field personnel. A ductile iron body as standard allows for a stronger body connection.
Built to ASME and ISO specifications, the new Keystone GRL and GRW valves’ single-piece body design is fully compliant with EN 593 and API 609 standards as well as Pressure Equipment Directive (97/23/EU) Module B1 + D and CE Marking. A wide range of approvals is already available, including KIWA, ABS, WRAS, NSF/ANSI STD 61.
Primary shaft sealing exceeds the pressure rating of the valves and prevents moisture penetration or leakage into the atmosphere. Secondary shaft seals provide back-up safety. The two-piece shaft design allows for a thin disc and provides minimal obstruction to flows of up to DN 300 (NPS 12). Body locating holes allow easy installation and centering between the flanges while an extended body neck accommodates pipe insulation. Top and bottom shaft bearings maximize support, minimize friction and decrease torque while a top bushing absorbs actuator side thrust loads.