Valves & Actuators

F. A. Q

Common Questions

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Can I Buy Directly From The Factory?

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Ball Valves

QEM supplies a comprehensive range of ball valves in various configurations to meet industry needs:

Configurations: Side entry, top entry, 1-piece, 2-piece, 3-piece, multi-port, fully fire-safe, anti-static, soft-seated, and metal-seated.
Materials: Carbon steels (including low temperature), stainless steels, Duplex steels, special alloys.
Sizes: 1/4″ to 30″, pressure classes 150# to 2500#.
End Connections: Screwed, weld ends, hub ends, flanged.

Butterfly Valves

QEM offers a range of butterfly valves designed for diverse applications:

Types: Eccentric, high-performance (zero-leakage), PTFE lined, resilient seated.
Materials: Aluminium bronze, Carbon steels (including low temperature), stainless steels, Duplex steels, special alloys.
Sizes: 2″ to 48″, various pressure classes.
End Connections: Wafer, lugged, flanged.

Check Valves

Our check valves ensure smooth operation and prevent backflow:

Types: Piston, swing, ball, nozzle, tilting disc, wafer, wafer lugged, wafer flanged, soft or metal seats.
Materials: Carbon steels (including low temperature), stainless steels, Duplex steels, special alloys.
Sizes: 1/4″ to 20″, pressure classes 150# to 2500#.
End Connections: Threaded, flanged, wafer type.

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Gate Valves

QEM provides robust gate valves for various applications:

Types: Standard wedge, through conduit (metal or soft seated, fire-safe).
Materials: Aluminium bronze, carbon steels (including low temperature), stainless steels, Duplex steels, special alloys.
Sizes: 1/4″ to 48″, pressure classes 150# to 2500#.
End Connections: Screwed, weld ends, hub ends, flanged, bonnet connections (pressure sealed, bolted, welded).

Globe Valves

Our globe valves regulate flow effectively in various systems:

Types: T-type, Y-type, fixed, rotating, throttling, needle, ball, parabolic disc.
Materials: Carbon steels (including low temperature), stainless steels, Duplex steels, special alloys.
Sizes: 1/4″ to 48″, pressure classes 150# to 2500#.
End Connections: Threaded, weld ends, hub ends, flanged, bonnet connections (pressure sealed, bolted, welded).

Strainers

QEM supplies strainers to protect equipment from process fluid contaminants:

Types: Y-type, basket type, duplex, self-cleaning.
Materials: Matching the valve body material, screens in stainless steel, duplex and even Monel can be provided.
Sizes: 1/4″ to 24″, various pressure classes.
End Connections: Screwed, weld ends, flanged.

Double Block & Bleed Valves

Our Double Block & Bleed valves ensure reliable isolation:

Types: Compact, modular, integral.
Materials: Carbon steels (including low temperature), stainless steels, Duplex steels, special alloys.
Sizes: 1/2″ to 3” for instrumentation, 1” to 36” for pipeline valves, pressure classes 150# to 2500#, API 3000 & API 10000.
End Connections: Flange to flange, flange to thread, hub, butt weld.

Control Valves

QEM provides control valves for precise flow control:

Types: Globe (single or multiple seat, angle type), butterfly, v-notch ball.
Materials: Carbon steels (including low temperature), stainless steels, Duplex steels, special alloys.
Sizes: 1/4″ to 36″, pressure classes 150# to 2500#.
End Connections: Flanged, welded.

Actuators

QEM offers a wide range of actuators and accessories:

Types: Diaphragm, electric (quarter or multi-turn), hydraulic, pneumatic (linear, quarter turn, rack & pinion, scotch-yoke), spring return (fail close/open), double acting, gas over oil.
Accessories: Mounting brackets, solenoid valves, limit switches, pneumatic & electro-pneumatic positioners, filter/pressure regulators, block & vent valves, air/hydraulic accumulator tanks, gear overrides.

For tailored procurement solutions, QEM provides comprehensive support from one-off purchases to large-scale projects. Each product is selected to meet the highest standards of quality and performance, ensuring reliability and efficiency in your applications.