API Bellows Seal Globe Valve
Standards
Design & manufacture: BS 1873
Face to Face:ASTM B16.10
Testing inspection: API 598
Flanged end dimension: ASME B16.5
Butt-Welded end dimension: ASME B16.25
Socket-Welded end dimension: ASME B16.11
Pressure temperature ratings: ASME B16.34
描述
API Globe Valve
The features of globe valve
Bolted Bonnet; Outside Screw and Yoke; Rising stems: Metallic seating surfaces
Body and Bonnet Connection
The body and bonnet of Class150-Class900 globe valves are usually with studs And nuts. And the body and bonnet of Class 1500-Class2500 globe valve are usually of pressure seal design
Gasket of Cover Flange
Stainless steel+flexible graphite wounded gasket is used for Class 150 and Class300 globe valve. Stainless steel+flexible graphite wounded gasket is used for Class600, and ring joint gasket is also optional for Class600. Ring joint gasket is used for Class900 globe valve. Pressure seal design is used for Class 1500-Class2500 globe valve.
Actuation
Hand wheel, impact hand wheel&gear box is usually used for globe valve actuation. Chain wheel and electric actuator can be also used for globe valve actuation if being requested by the customers
Seat
For carbon steel globe valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. the seat have two type; welded on seat and integral seal, For stainless globe valve, integral seat is usually adopted, or to weld hard alloy directly integrally. If the customer have any other request about the seat, please kindly advise before placing the order
