Product Category
Industrial Globe Valves
Multi-turn throttling and shut-off valves for precise flow regulation in steam, process, and utility services. Straight pattern, angle body, Y-pattern, and needle valve configurations in forged and cast designs from DN 6 to DN 400.
Globe Valve Body Patterns
Straight (T-Pattern) Globe Valves
The standard globe valve body — fluid enters from below the seat, changes direction through the seat port, and exits horizontally. The flow path makes two 90° turns, causing higher pressure drop than gate or ball valves. The high pressure drop is actually useful for throttling, since small stem movement produces a proportional change in flow. Standard for steam, process fluids, and HVAC service.
Angle Globe Valves
The inlet and outlet are at 90° to each other — the body makes the turn rather than the piping. Lower pressure drop than straight pattern (one 90° change instead of two). Used at the bottom of vertical pipelines, pump discharge, and where flow enters from above (drains, condensate). Also useful where a pipe elbow would be required — combines the valve and elbow in one fitting. Brands: Crane, Velan, Flowserve.
Y-Pattern Globe Valves
The stem and seat are at 45° to the pipe axis. This provides a straighter flow path than a standard globe — significantly lower pressure drop, approaching that of a gate valve. Used in high-pressure, high-velocity applications: main steam stop valves, power plant feedwater, and services where pressure drop must be minimised while retaining throttling capability. Brands: Crane, KSB, Velan.
Needle Valves
A long tapered needle-shaped plunger seats into a matching cone-shaped seat orifice. Excellent for precision flow control at small orifice sizes — used for instrument connections, sample points, gauge isolation, metering, and chemical injection. Available in forged bodies (typically 1/4" to 2") with NPT, Swagelok-type compression, or tube fitting connections. Brands: Swagelok, Ham-Let, Parker, Velan, Crane, Hoke.
Trim Designs
- Plug disc: Flat, broad-faced disc — general service. Provides good throttling at partial opening.
- Composition disc: Non-metallic seat insert (TFE, rubber) for tight shut-off on low-pressure steam and water.
- Needle disc (plug): Pointed plug for precise fine-flow regulation — instrument valves.
- Parabolic plug: For equal-percentage or linear flow characteristic — manual globe valves where accurate regulation is needed.
Applications
- Steam systems: Steam stop valves, trap bypasses, drain valves, pressure-reducing stations (Spirax Sarco, IMI, Crane)
- Feedwater systems: High-pressure boiler feedwater, BFP recirculation, economiser vents
- Process throttling: Flow regulation where a control valve is not justified but precise manual throttling is needed
- Instrument isolation: Root valves for pressure transmitters, flow elements, level gauges (needle and forged globe)
- Chemical injection: Dosing point isolation and metering (forged stainless needle valves)
Design Standards
- API 602: Gate, globe and check valves — forged steel, small bore (≤ DN 100 / 4").
- API 603: Class 150 cast corrosion-resistant globe valves.
- BS 1873 / EN 13709: Steel globe and check valves for general purposes.
- ASME B16.34: Pressure-temperature ratings for flanged and butt-welding valves.
- MSS SP-80: Bronze globe and angle valves.
Body Materials
- Forged carbon steel (ASTM A105): High-pressure small-bore globe and needle valves — standard API 602 material.
- Cast carbon steel (ASTM A216 WCB): General process service — larger cast globe valves.
- Forged stainless (ASTM A182 F316): Corrosive media, cryogenic, pharmaceutical, food.
- Cast stainless (ASTM A351 CF8M): Larger stainless globe valves for corrosive process.
- Alloy steels (F11, F22, F91): High-temperature service — main steam, boiler feed, HP heaters.
- Bronze (ASTM B62): Marine, seawater, HVAC, potable water systems.
| Brand | Body Pattern | Key Products / Standards |
|---|---|---|
| Crane Valves | Straight, angle, Y-pattern | API 602 forged, BS 1873 cast — Class 150 to 2500 |
| KSB | Straight, Y-pattern | NORI, BOA, ISORIA globe valves — PN 16 to PN 400 |
| Velan | Straight, angle, Y-pattern | API 602 forged, API 603 cast — cryogenic and nuclear |
| Flowserve (Edward/Valbart) | Straight, angle, Y-pattern | Edward Vogt globe valves — power generation specialist |
| Spirax Sarco | Straight, angle | BV14/15, M10/11 — steam, condensate, heat exchange |
| IMI plc (Orton / STI) | Straight, Y-pattern | High-pressure power plant globe valves |
| SAMSON AG | Straight | Self-actuated regulators and stop valves — PN 16 to PN 400 |
| Swagelok / Ham-Let | Needle | Precision needle and integral bonnet valves — instrument duty |
Frequently Asked Questions
Why do globe valves have higher pressure drop than gate or ball valves?
In a straight-pattern globe valve, the fluid must change direction twice as it passes through — entering below the seat and exiting horizontally. This tortuous flow path creates turbulence and pressure loss. A gate valve and ball valve have a near-straight through bore, so pressure drop is much lower. The globe valve's inherent restriction is actually advantageous for throttling, since it creates a well-defined pressure drop that varies predictably with disc position. If pressure drop is a concern, specify a Y-pattern globe valve, which has a more favourable 45° flow path.
What is the difference between a globe valve and a control valve?
A manual globe valve is operated by hand — typically for infrequent regulation (start-up, maintenance bypass, seasonal adjustment). A control valve is a globe valve (or rotary valve) fitted with a pneumatic or electric actuator and a positioner — it modulates continuously in response to a 4–20 mA or fieldbus signal from a process controller. Control valves are engineered and sized for precise Cv and flow characteristic. Manual globe valves are simpler, cheaper, and used where automated control is not required.
Can you supply globe valves for high-temperature steam service?
Yes. For high-temperature steam (above 400°C), we supply globe valves in alloy steel materials: ASTM A182 F22 (2¼Cr-1Mo) for up to 600°C and F91 (9Cr-1Mo-V) for higher temperatures in power plant applications. These materials meet API 602, ASME B16.34, and power plant engineering specifications. Y-pattern bodies are often specified for high-pressure steam to minimise pressure drop and reduce flow-induced erosion. We can supply with full material test reports (MTRs) and PMI testing.