Gate / globe / check valves

For high-temperature, high-pressure duty with multiple material and pressure-class options. Bonnet design is typed A–D by pressure class and size; high-pressure or large-size valves use a bearing-type manual operator to reduce torque.

Category	Size and pressure	Notes
Cast and forged steel gate valve	2.0″–24″, ANSI 600–2500	Wedge and parallel designs, self-sealing body
Globe valve (straight)	2.0″–24″, ANSI 600–2500	Two-piece packing gland, protects stem from galling
Globe valve (Y-pattern)	1/2″–4.0″, ANSI 1500–4500	Low resistance, erosion resistant, for severe piping
Check valve	2.0″–24″, ANSI 600–2500	Swing type, bonnet typed by size

Ball valves (metal seated)

Conventional ball valves are limited by PTFE seats and struggle with high temperature and solids. Metal-seated ball valves use hardened ball and seat (nickel alloy, tungsten carbide, chromium carbide), in floating and trunnion-mounted versions.

Feature	Detail
Size and pressure	3/8″–36″, 150–4500Lb, service temperature -40~570°C
Sealing	Trunnion type normally upstream-seated, floating type downstream-seated; ball lapped to full contact
Safety design	Fire-safe construction, anti-static path, blow-out proof stem, actuator mounting pad
Connection and actuation	Flanged, butt-weld, optional threaded/socket/clamp; worm gear, electric, pneumatic, hydraulic

Butterfly valves (triple-offset, bi-directional hard seal)

The triple-offset geometry lifts the sealing surfaces apart during travel, cutting wear; bi-directional pressure capability makes it suitable for large-size isolation and control.

Feature	Detail
Size and pressure	1-1/4″–80″, 150–600Lb, -40~610°C
Sealing	All-metal seat: alloy steel HRC30–45, Stellite HRC40–60, tungsten carbide HRC70+
Low emission	Standard low-emission stem seal, leakage 0–20 PPM; live-loaded packing good for 5000 cycles without adjustment
Mounting	Blow-out proof stem ring, replaceable disc seal ring, ISO5211 mounting bracket

Control valves

Body styles are standard globe and angle; trims are chosen by duty: post-guided, balanced, low-flow, multi-hole and anti-cavitation. Flow characteristics include equal percentage, linear and quick-open.

Category	Size and pressure	Notes
General control valve	1/2″–12″, 125–900#	Standard globe or angle body; flanged, butt-weld, threaded
High-differential control valve	3/8″–4″, 4500Lb, 610°C	Anti-abrasion: seat overlay 8 mm and above, built-in pressure-reducing protection, serviceable in line
Severe-service control valve (360)	1″–8″, ASME 150/300/600/900	Multi-stage pressure drop, low-recovery trim, top-mounted for easy maintenance

Instrument valves and fittings

Y-pattern process instrument valves are designed to ASME B16.34 and address the internal leakage caused by high-velocity erosion and bubble collapse in severe service. Manifolds, tube fittings and needle valves complete the instrument piping and sampling package.

Category	Parameters
Y-pattern process instrument valve	1/4″–1-1/4″, 150–4500Lb; carbon steel -50~425°C, alloy steel -50~640°C, stainless steel -50~700°C
Instrument manifolds	2-, 3- and 5-valve manifolds for transmitters
Tube fittings and needle valves	316 stainless steel, medium and high pressure series

The above summarises catalogue parameters. Selection depends on medium, temperature, differential pressure, flow and connection standard; dimension drawings and material certificates are available on request.