FQ SERIES

Floating Metal-Seated Ball Valve (API 608 / API 607)

Floating Metal-Seated Ball Valve (API 608 / API 607) is a split-body, two-piece floating ball design with an end-entry bolted flange configuration. Engineered strictly to API 608 standards and fire-tested to API 607 compliance, this series provides critical safety features including fireproof protection, a blowout-proof stem, and anti-static continuity.

Design Standard

–API6D,API 608,ISO 17292

Face to Face

–ASME B16.10,API 6D

End Connection

–Flanged RF ASME B16.5,HG/T 20615

Fire Safe

–API607,ISO10497

Pressure Test

— API598,API6D

Mounting Pad

–ISO 5211 Top Flange

Temp. & Pressure Standard

–ASME B16.34

—100～+425℃-

Body Materials

— Hastelloy, Duplex Steel, Carbon Steel and Low Temp Carbon Steel, Stainless Steel, Titanium etc.

Construction

–Two-piece body(end entry)
–Floating ball
–Anti static device
–Blow-out proof stem
–Fire safe design
–Ball cavity relief

Seats

–Metal Seated Hard Alloy

Size & bore

–NPS 1/2”-8” DN15-DN200

Pressure range

–ANSI 150 to 300 lbs

–ISO PN10 to PN40

Operated

— Lever

— Gear

— Actuator (pneumatic – electric – hydraulic)

Application

-Water, pulp, oil, steam, acids, alkali, ammonia, urea, natural gas with sulfur etc.

Feature supplement

Fire-Safe Protection

–High temperatures destroy non-metal seals; line pressure then forces the ball against the secondary metal seat lip to block internal leakage.

Metal-Seated Hard Alloys

–Hard alloy sealing faces withstand extreme temperatures, resist high corrosion, prolong service life, and ensure 100% fire-safe security.

Blowout-Proof Stem System

–High-pressure safety design prevents shaft ejection, while an upper back-seat sealing mechanism maximizes packing reliability.

ISO 5211 Direct Mounting Pad

–Standardized dimensions enable rapid, direct automation mounting for electric, pneumatic, or worm-gear actuators without brackets.

Locking Device

–Manual hand levers detach easily for tight spaces; optional locking hardware prevents unauthorized or accidental outdoor tampering.

Anti-Static Design

–Engineered with an intrinsic anti-static mechanism, the valve creates a continuous electrical path from the ball to the body via the stem, preventing hazardous static electricity accumulation

Flow Control Customization:

–Parallel flat stems provide instant visual position indication. Optional V-port slotted balls are available for precise throttling.