Low-Pressure Bolted Bonnet Inclined Globe Valve

Caractéristiques et avantages

• Higher Cv due to Y-pattern design allows more flow over traditional globe T-pattern.
• Unique non-rotating stem design is easily adaptable for actuation with precision ACME threads and a burnished finish. Valve is suitable for horizontal installation.
• All graphite-packed globe valves are dual qualified to API 624 and ISO-15848-1, with the stuffing box burnished to a fine surface finish.
• Available in all trim material combinations specified in API 623, as well as custom material combinations.
• All sizes and pressure classes have conical seats to ensure tight shut-off.
• Seat face is CoCr alloy hardfaced, ground, and lapped to a mirror finish, with the conical seat machined to a fine surface finish.
• Body-guided disc ensures smooth, robust operation and accurately mates the seating surface of the disc with the surface of the body seat. When specified by the purchaser, the disc guides are hardfaced to enhance smooth guiding and extend wear life.
• Body and bonnet castings are precision machined, with a one-piece bonnet for better alignment and fewer parts.
• Body and bonnet joint is accurately machined to the required serrated surface finish with a fully enclosed gasket.
• Gland has a two-piece construction for easy alignment.
• Torque arm reduces wear on packing rings, enables better sealing, and reduces torque.
• Rotating stem nut is austenitic ductile iron Gr. D-2C and serviceable in line. When a handwheel is used, thrust bearing arrangements vary depending on valve size and class.
• End connection flanges are in accordance with ASME B16.5.
  ASME Class 300 uses a 1/16-inch raised face.
  ASME Class 600 uses a 1/4-inch raised face.
  Finish is 125–250 AARH for all valves.
• Impactor handwheels:
  Globe, stop check, and needle valves require higher closing torques than gate valves with the same seat diameter and pressure class. The most economical mechanism for tight shutoff is the impactor handwheel. Two lugs cast under the wheel strike simultaneous blows and provide 3 to 10 times the closing force of standard handwheels. Impactor handwheels are supplied at the manufacturer’s option unless specified by the purchaser.