Steam Traps

Industrial steam traps are used to discharge condensate and non-condensable gases from saturated steam systems, including steam mains, distribution lines, heat exchangers, process heaters, manifolds, and pipeline drain points. The category includes float-operated traps, inverted bucket traps, thermodynamic disc traps, thermostatic capsule traps, bimetallic traps, sanitary-pattern designs, and steam trap connectors for rapid replacement of trap elements.

Selection is based on condensate load, differential pressure, return-line backpressure, startup behavior, air venting requirement, degree of condensate subcooling, and maintenance access. Float traps are generally applied where continuous condensate removal is required under variable load. Thermodynamic traps are commonly specified for steam distribution and tracing lines. Bimetallic and thermostatic designs are used where controlled subcooling is acceptable or required. Inverted bucket traps are selected where a robust mechanical operating cycle is preferred and resistance to water hammer is a consideration.

Available designs are manufactured to DIN, ANSI, and JIS standards, with pressure ratings ranging from low PN classes to higher PN, ASME Class, or JIS pressure classes, depending on trap type and body construction. End connections include BSP, NPT, flanged, socket weld, butt weld, union weld ends, and clamp fittings for hygienic service. Body and internals materials include cast iron, ductile iron, cast steel, carbon steel, stainless steel, and EN/ASTM alloy grades selected for compatibility with steam, condensate, oxygen-bearing startup conditions, and elevated thermal cycling. Selection should also consider failure mode, blow-through risk, allowable steam loss, maintainability, and leakage performance over the service interval.

Ball Float and Thermostatic
Ball Float and Thermostatic
Thermostatic (Capsule)
Thermostatic (Capsule)
Thermostatic (Bimetallic)
Thermostatic (Bimetallic)
Thermodynamic
Thermodynamic
Inverted Bucket
Inverted Bucket
Sanitary
Sanitary
Connectors
Connectors
Thermodynamic steam trap - CONA TD | ARI | Philippopoulos s.a.

Thermodynamic steam trap - CONA TD | ARI

Thermodynamic steam trap - CONA TD | ARI
Ari-Armaturen
ARI CONA TD – Thermodynamic Steam Trap The ARI CONA TD is a thermodynamic steam trap designed for discharging lightly to heavily subcooled condensate in steam networks. It operates periodically via a disc/controller and does not require an external actuator. The series includes a body with an internal filter Fig. 640 or an external filter Fig. 641 Y....
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Capsule steam trap - CONA M | ARI | Philippopoulos s.a.

Capsule steam trap - CONA M | ARI

Capsule steam trap - CONA M | ARI
Ari-Armaturen
ARI CONA M – Thermostatic Capsule Steam Trap The ARI CONA M is a thermostatic steam trap designed for draining steam in industrial installations. It operates via a membrane capsule that responds to condensate temperature and upstream pressure. It discharges subcooled condensate and automatically vents during startup and operation. Variants and...
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Bimetallic steam trap - CONA B | ARI | Philippopoulos s.a.

Bimetallic steam trap - CONA B | ARI

Bimetallic steam trap - CONA B | ARI
Ari-Armaturen
ARI CONA B – Bimetallic Thermostatic Steam Trap The ARI CONA B is a bimetallic thermostatic steam trap designed for discharging lightly to heavily subcooled condensate from steam networks. The bimetallic controller adjusts the valve position based on condensate temperature, with subcooling continuously adjustable according to operating instructions....
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Float & thermostatic steam trap - CONA SC / SC Plus | ARI | Philippopoulos s.a.

Float & thermostatic steam trap - CONA SC / SC Plus | ARI

Float & thermostatic steam trap - CONA SC / SC Plus | ARI
Ari-Armaturen
ARI CONA SC / SC Plus Float Steam Trap The ARI CONA SC is a float steam trap equipped with a thermostatic air vent capsule, designed for condensate removal from saturated steam networks, heat exchangers, heating elements, low/medium pressure steam boilers, and distribution lines. Discharge occurs immediately based on condensate level without requiring...
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Float & thermostatic steam trap - CONA S | ARI | Philippopoulos s.a.

Float & thermostatic steam trap - CONA S | ARI

Float & thermostatic steam trap - CONA S | ARI
Ari-Armaturen
ARI CONA S Float Steam Trap The ARI CONA S is a mechanical float steam trap designed for continuous condensate removal from industrial steam networks. The float regulates condensate levels, while the integrated bimetallic element opens during startup to remove air and non-condensable gases; control is transferred to the float mechanism above 90 °C....
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CONA connector | ARI | Philippopoulos s.a.

CONA connector | ARI

CONA connector | ARI
Ari-Armaturen
ARI CONA Connector – Steam Trap Adapter The ARI CONA Connector is a fixed piping adapter designed for quick installation and replacement of CONA Universal units. It is not a standalone steam trap; rather, it serves as the connection body for attaching thermostatic, bimetallic, float, or thermodynamic steam trap units. Versions 681: Basic system...
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CONA All-in-one | ARI | Philippopoulos s.a.

CONA All-in-one | ARI

CONA All-in-one | ARI
Ari-Armaturen
ARI CONA All-in-one – Steam Trap Station PN40 The ARI CONA All-in-one is a steam drainage assembly with integrated inlet/outlet valves, check valve, and internal filter. It is used when the steam trap needs to be isolated, inspected, and maintained without additional spool pieces and independent valves in the line. CONA B All-in-one The CONA B 60A version...
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Float operated pump trap - CONA P | ARI | Philippopoulos s.a.

Float operated pump trap - CONA P | ARI

Float operated pump trap - CONA P | ARI
Ari-Armaturen
ARI CONA P – Float Steam Trap with Pump Functionality The ARI CONA P is a PN16 float steam trap with integrated mechanical condensate pump functionality. It is used in heat exchangers and closed vessels where differential pressure is not consistently positive, such as in low steam pressure operations, variable loads, or vacuum conditions. When the inlet...
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Inverted bucket steam trap - ES5 | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ES5 | Miyawaki

Inverted bucket steam trap - ES5 | Miyawaki
Miyawaki
Miyawaki ES5 – Inverted Bucket Steam Trap The Miyawaki ES5 is a mechanical inverted bucket steam trap designed for small to medium condensate loads in steam networks. Its operation relies on the density difference between steam and condensate: when the bucket loses buoyancy, the valve opens to discharge condensate; when steam enters, the bucket rises,...
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Inverted bucket steam trap - ESU5 | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ESU5 | Miyawaki

Inverted bucket steam trap - ESU5 | Miyawaki
Miyawaki
Miyawaki ESU5 – Inverted Bucket Steam Trap, Stainless Steel Construction The Miyawaki ESU5 is a mechanical inverted bucket steam trap designed for small to medium condensate loads. Constructed from stainless cast steel SCS13A / CF8, it is suitable for steam lines requiring enhanced corrosion resistance compared to cast iron versions. Technical...
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Inverted bucket steam trap - ES8N | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ES8N | Miyawaki

Inverted bucket steam trap - ES8N | Miyawaki
Miyawaki
Miyawaki ES8N – Inverted Bucket Steam Trap The Miyawaki ES8N is a mechanical inverted bucket steam trap constructed from ductile cast iron FCD450, designed for small to medium condensate loads in steam lines and process equipment. Its operation relies on the buoyancy of the bucket: the valve opens with condensate, while steam entry lifts the bucket,...
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Inverted bucket steam trap - ES10 | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ES10 | Miyawaki

Inverted bucket steam trap - ES10 | Miyawaki
Miyawaki
Miyawaki ES10 – Inverted Bucket Steam Trap The Miyawaki ES10 is an inverted bucket steam trap made from FC250 cast iron, designed for small to medium condensate loads in steam networks. The bucket operates the valve via a lever mechanism: the seat opens with condensate presence, and the bucket rises to close with steam entry. Discharge...
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Inverted bucket steam trap - ES12N | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ES12N | Miyawaki

Inverted bucket steam trap - ES12N | Miyawaki
Miyawaki
Miyawaki ES12N – Inverted Bucket Steam Trap The Miyawaki ES12N is a mechanical inverted bucket steam trap made from cast iron FC250, designed for medium condensate loads in steam networks and process equipment. Drainage is achieved through a mechanical bucket/lever mechanism, without the need for electrical or pneumatic actuators. Technical...
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Inverted bucket steam trap - ESH8N | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ESH8N | Miyawaki

Inverted bucket steam trap - ESH8N | Miyawaki
Miyawaki
Miyawaki ESH8N – Inverted Bucket Steam Trap for High Pressure The Miyawaki ESH8N is a mechanical inverted bucket steam trap made from cast steel WCB, designed for medium condensate loads and medium to high-pressure steam networks. Discharge is based on the buoyancy of the bucket, operating without electrical or pneumatic actuators. Technical...
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Inverted bucket steam trap - ESH21 | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ESH21 | Miyawaki

Inverted bucket steam trap - ESH21 | Miyawaki
Miyawaki
Miyawaki ESH21 – Inverted Bucket Steam Trap The Miyawaki ESH21 is a mechanical inverted bucket steam trap constructed from cast steel SCPH2, designed for medium condensate loads in medium to high-pressure steam systems. Discharge is achieved through a bucket, lever, and seat mechanism, without an external actuator. Depending on the load, the discharge...
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Inverted bucket steam trap - ER25 | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ER25 | Miyawaki

Inverted bucket steam trap - ER25 | Miyawaki
Miyawaki
Miyawaki ER25 – Inverted Bucket Steam Trap The Miyawaki ER25 is a mechanical inverted bucket steam trap made from cast steel SCPH2, designed for high condensate loads and higher pressure steam applications. It operates using a dual steam separation mechanism with a U-shaped duct and inverted bucket, allowing condensate discharge through mechanical...
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Inverted bucket steam trap - ER105 | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ER105 | Miyawaki

Inverted bucket steam trap - ER105 | Miyawaki
Miyawaki
Miyawaki ER105 – Inverted Bucket Steam Trap The Miyawaki ER105 is an inverted bucket steam trap made from cast iron FC250, designed for condensate drainage in low-pressure steam systems. It is intended for applications requiring mechanical operation without electrical or pneumatic actuators and offers on-line repairability. Technical Specifications...
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Inverted bucket steam trap - ER110 | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ER110 | Miyawaki

Inverted bucket steam trap - ER110 | Miyawaki
Miyawaki
Miyawaki ER110 – Inverted Bucket Steam Trap The Miyawaki ER110 is an inverted bucket steam trap made from cast iron FC250, designed for medium to large condensate loads in low to medium pressure steam systems. It operates on a mechanical steam-condensate separation principle using a U-shaped duct and bucket, without requiring electric or pneumatic...
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Inverted bucket steam trap - ER116 | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ER116 | Miyawaki

Inverted bucket steam trap - ER116 | Miyawaki
Miyawaki
Miyawaki ER116 – Inverted Bucket Steam Trap The Miyawaki ER116 is a mechanical inverted bucket steam trap made from ductile cast iron FCD450, designed for medium to large condensate loads in steam networks. It employs a dual steam separation mechanism with a U-shaped duct and inverted bucket, allowing mechanical discharge without an external actuator....
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Inverted bucket steam trap - ER120 | Miyawaki | Philippopoulos s.a.

Inverted bucket steam trap - ER120 | Miyawaki

Inverted bucket steam trap - ER120 | Miyawaki
Miyawaki
Miyawaki ER120 – Inverted Bucket Steam Trap The Miyawaki ER120 is an inverted bucket steam trap made from cast iron FC250, designed for high condensate loads in low/medium pressure steam networks. It features flanged connections ranging from 1½" to 2½" and operates without the need for electric or pneumatic actuators. Technical Specifications...
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Ball float steam trap - UNA | Gestra | Philippopoulos s.a.

Ball float steam trap - UNA | Gestra

Ball float steam trap - UNA | Gestra
Gestra
GESTRA UNA 38 Float Steam Trap The GESTRA UNA in PN100 configuration is a float steam trap designed for high-pressure applications, featuring a 1.5415 body and needle seat mechanism. Operation is based on condensate level: the float opens the rolling valve, with flow dependent on orifice size and available differential pressure. Technical Specifications...
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Ball float steam trap with pump function - UNA | Gestra | Philippopoulos s.a.

Ball float steam trap with pump function - UNA | Gestra

Ball float steam trap with pump function - UNA | Gestra
Gestra
GESTRA UNA 25-PK / UNA 25-PS with Pump Functionality The GESTRA UNA 25-PK / UNA 25-PS is a PN40, DN40 unit designed for condensate removal from steam systems using motive steam. It is utilized when the pressure at the outlet of a heat exchanger or heating element falls below the backpressure of the return line, and a simple steam trap cannot evacuate....
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Thermostatic membrane steam trap - MK | Gestra | Philippopoulos s.a.

Thermostatic membrane steam trap - MK | Gestra

Thermostatic membrane steam trap - MK | Gestra
Gestra
GESTRA MK – Thermostatic Membrane Steam Trap The GESTRA MK series employs a thermostatic membrane regulator for condensate removal and steam line venting. It is applied in steam tracing, distribution network drainage, small heat exchangers, and locations where limited condensate accumulation is acceptable before discharge. Technical Operation The capsule...
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Capsule steam trap for SIP and CIP processes - SMK | Gestra | Philippopoulos s.a.

Capsule steam trap for SIP and CIP processes - SMK | Gestra

Capsule steam trap for SIP and CIP processes - SMK | Gestra
Gestra
GESTRA SMK – Hygienic Steam Trap for SIP/CIP The GESTRA SMK is a thermostatic membrane steam trap from the STERIline series, designed for condensate removal and steam venting in sterile or aseptic processes. It is utilized in SIP, CIP, pharmaceutical lines, biotechnology, food/beverage, and clean steam facilities where minimal dead volume and...
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Steam Traps