The BOLA-TEK BT-FV4WMH is a flanged ball valve from the Taiwanese manufacturer BOLA-TEK MFG. Co., Ltd., founded in 1996 in Taichung. BOLA-TEK operates an integrated supply chain from in-house casting foundry through CNC machining, valve ball production, and final assembly — a vertically integrated model that allows full quality control from raw material to finished valve. The company holds ISO 9001, API 607 Fire Safe, and CE certifications.

What defines the BT-FV flanged valve series?

The BT-FV series covers BOLA-TEK's flanged-end ball valve range, available in 1-piece, 2-piece, and 3-piece body configurations. The standard flange drilling conforms to ANSI B16.5 Class 150, with PN16 and PN40 drilling patterns also offered for European-standard installations. Face-to-face dimensions follow ANSI B16.10. Body materials include CF8M (AISI 316 / 1.4408), CF8 (AISI 304 / 1.4308), and WCB carbon steel — covering the majority of industrial fluid handling requirements from general water service to aggressive chemical media.

What safety features are built in?

The BT-FV4WMH incorporates three standard safety features. An anti-static device provides electrical continuity between ball, stem, and body — preventing static charge buildup that could ignite flammable media in hydrocarbon and solvent service. A blow-out proof stem is retained from the inside of the body, ensuring that even if the stem nut or handle is removed under pressure, the stem cannot eject from the valve. An integral locking device on the lever handle supports lockout/tagout procedures for maintenance safety. For fire-critical installations, the API 607 fire-safe certification confirms that the valve maintains sealing integrity after exposure to fire conditions. A direct-mount ISO 5211 pad on the top flange enables bolt-on actuator installation without adapter plates.