Steam Trapping

Steam traps and condensate handling equipment are used in saturated and superheated steam systems to remove condensate, air, and non-condensable gases without continuous loss of live steam. Selection is based on condensate load in kg/h, differential pressure, return backpressure, condensate temperature, start-up conditions, risk of water hammer, venting requirements, and installation position.

Float steam traps are applied on heat exchangers, heating coils, tanks, and process equipment with variable condensate load where continuous drainage close to saturation temperature is required. Available end connections include BSP, NPT, flanged, socket weld, and butt weld. Typical body materials include EN-JL1040, EN-JS1049, 1.0460, and 1.4541, with pressure ratings such as PN16, PN25, or PN40 depending on construction.

Bimetallic thermostatic steam traps are used for steam tracing, line drainage, and services where controlled condensate subcooling is acceptable. The CONA B series is specified in DN15-DN50, PN16 or PN40, with controller options for differential pressure up to 13, 22, or 32 bar, and high-pressure versions up to PN630. Factory-set subcooling can be adjusted mechanically, which is relevant where line thermal response affects process stability.

Thermodynamic disc steam traps are used on steam mains, manifolds, and low-point drainage points where intermittent discharge is acceptable. For CONA TD, the stated range includes PN40 in DN15-DN25, with materials such as 1.0460, 1.5415, or 1.4541, and differential pressure up to 32 bar. Backpressure should remain within 0.8 of inlet pressure to maintain correct operation.

In systems with multiple drainage points, receivers, condensate manifolds, sight glasses, and Cona Control monitoring systems support functional checks, identification of steam leakage or blockage, and condition-based maintenance. Where condensate must be returned from low pressure to a higher-pressure header, mechanical condensate pumps are used. These operate without electrical power and are available in materials such as P235GH, P250GH, P265GH, and 1.4571, with typical service temperatures up to 200°C.

Steam Traps
Steam Traps
Systems & measurement
Systems & measurement
Condensate Pumps
Condensate Pumps
Automatic Condensate Drain Valves
Automatic Condensate Drain Valves
Sight Glasses
Sight Glasses
Manifolds
Manifolds
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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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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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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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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Liquid Drainer | ARI | Philippopoulos s.a.

Liquid Drainer | ARI

Liquid Drainer | ARI
Ari-Armaturen
Automatic Drain Valve ARI CONA 665 The ARI CONA 665 is an automatic liquid drain valve designed for the removal of condensate from steam lines during startup and shutdown. Its operation is based on a spring and bimetallic controller; it remains open in a depressurized network and closes when the set differential pressure is reached, factory set at ≥1.5...
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Collector / distributor of condensate with stuffing box | ARI | Philippopoulos s.a.

Collector / distributor of condensate with stuffing box | ARI

Collector / distributor of condensate with stuffing box | ARI
Ari-Armaturen
Condensate Collector / Steam Distributor ARI CODI S The ARI CODI S is a PN40 manifold featuring integrated isolation valves and graphite gland packing. It functions as either a condensate collector or a steam distributor, depending on flow direction and network connection configuration. Available in vertical Fig. 671 and horizontal Fig. 672 versions....
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Monitoring system for steam traps - Cona Control | ARI | Philippopoulos s.a.

Monitoring system for steam traps - Cona Control | ARI

Monitoring system for steam traps - Cona Control | ARI
Ari-Armaturen
CONA-control ARI – Steam Trap Monitoring The CONA-control system is utilized for continuous monitoring of steam traps in steam and condensate return networks. It identifies two primary failures: steam leakage through the trap and blockage due to cold condensate accumulation. Measurement is conducted using a temperature/calorimetric sensor in a control...
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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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Double window sight glass | ARI | Philippopoulos s.a.

Double window sight glass | ARI

Double window sight glass | ARI
Ari-Armaturen
ARI BR660 Dual-Sided Flow Indicator The ARI BR660 is a flow indicator featuring two borosilicate glass observation windows for visual flow inspection in pipelines. It has no moving parts and is primarily used for monitoring condensate, steam, and process liquids before steam traps or in lines requiring local flow indication. Technical Specifications...
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Condensate pump - CONALIFT | ARI | Philippopoulos s.a.

Condensate pump - CONALIFT | ARI

Condensate pump - CONALIFT | ARI
Ari-Armaturen
ARI-CONLIFT® Condensate Pump The ARI-CONLIFT® is a mechanical positive displacement condensate pump, operating via a float mechanism. It requires no electrical power; pumping is achieved using steam, compressed air, or inert gas as the driving medium. It is used for transferring condensate from a lower level or pressure to a return network with higher...
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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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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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Condensate discharge temperature limiter | ARI | Philippopoulos s.a.

Condensate discharge temperature limiter | ARI

Condensate discharge temperature limiter | ARI
Ari-Armaturen
Condensate Discharge with Temperature Limiter ARI CONA 645/647 The ARI CONA 645 and 647 are thermostatic steam traps PN40 designed for condensate discharge at controlled temperatures, preventing secondary steam release at the drainage point. Operating temperature is adjustable between 60–140°C, controlled by a corrosion-resistant bimetallic element,...
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Liquid return temperature limiter | ARI | Philippopoulos s.a.

Liquid return temperature limiter | ARI

Liquid return temperature limiter | ARI
Ari-Armaturen
ARI CONA 650 Return Temperature Limiter The ARI CONA 650 is a self-acting return temperature limiter for hot water circuits and compatible fluids in heating systems. It regulates flow based on return temperature: the valve opens more as temperature drops and restricts flow as it rises. Even in a closed position, a small flow is maintained to provide the...
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Collector / distributor of condensate with bellow seal and vertical installation | ARI | Philippopoulos s.a.

Collector / distributor of condensate with bellow seal and vertical installation | ARI

Collector / distributor of condensate with bellow seal and vertical installation | ARI
Ari-Armaturen
Condensate Collector / Steam Distributor ARI CODI B 675 The ARI CODI B Fig. 675 is a vertical manifold designed for condensate collection or steam distribution, featuring integrated isolation valves and metal bellows shaft sealing. This construction is selected for enhanced atmospheric sealing and reduced maintenance needs at multiple connection points....
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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 - 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 - 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 - 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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Related posts

How to Select the Right Steam Trap for Industrial Applications
How to Select the Right Steam Trap for Industrial Applications
Posted in: Articles
05/17/2026
A steam trap is a self-acting valve used to discharge condensate, air, and non-condensable gases from a steam system...
Read more
Steam Trapping