Gate Valve - Bolted Bonnet - ASME | Valvosider

Valvosider Bolted Bonnet Gate Valve per ASME

The Valvosider bolted bonnet ASME gate valve is designed for flow isolation in steam, thermal oil, gases, hydrocarbons, and industrial process fluids. It functions as an on/off valve and is not intended for throttling, as partial opening can cause erosion to seats and wedge.

Types and Pressure Classes

• Fig. 450: ASME Class 150, 2"–48"
• Fig. 451: ASME Class 300, 2"–48"
• Fig. 452: ASME Class 600, 2"–40"
• Fig. 453: ASME Class 900, 2"–24"
• Fig. 454: ASME Class 1500, 2"–24"
• Fig. 455: ASME Class 2500, 2"–12"

Construction and Standards

Features include oval body, bolted bonnet, outside screw & yoke, rising stem, non-rising handwheel. Design follows API 600, BS 1414, ASME B16.34, ISO 10434. Face-to-face dimensions per ASME B16.10, flanges ASME B16.5 up to 24" and ASME B16.47 from 26", with BW ends ASME B16.25 option. Testing per API 598 / EN 12266, marking MSS-SP 25, CE/PED, and certificates EN 10204 3.1 / 3.2.

Materials and Sealing

Available bodies: ASTM A216 WCB, A352 LCB, A217 WC6/C5/C12, A351 CF8/CF8C/CF8M/CF3M. Seat and wedge surfaces can be supplied with F6A, F304, F316 or special coatings like Stellite, Monel, Hastelloy. Stem sealing with graphite rings & wiper rings. Gasket options include reinforced graphite or spiral wound graphite/RTJ depending on class.

Operation Options

Available with top flange ISO 5210, gear reducer, chain wheel, electric, pneumatic or hydraulic actuator, position indicator, limit switches, locking/interlock, stem extension, lantern ring, extended stuffing box, live-loaded packing, drain plug, and by-pass. Gear reducer recommended from 16" Class 150, 12" Class 300, 8" Class 600, 6" Class 900/1500, and 4" Class 2500.

FAQ

Bolted bonnet or bellow seal?
Bolted bonnet for standard sealing with packing. Bellow seal when stem leakage must be significantly minimized.

RF, RTJ, or BW?
RF for standard flanged lines, RTJ for higher pressure classes, BW for welded process lines.