Inverted bucket steam trap inlet national standard BX991 BX995

Boshi always adheres to the business philosophy of "gaining reputation through quality, winning customers with advanced technology," striving to build a modern enterprise with a more pragmatic spirit, superior products, and comprehensive services.

Main products: Free float steam traps, thermodynamic steam traps, inverted bucket steam traps, adjustable bimetal steam traps, lever float steam traps, high-temperature and high-pressure steam traps, and bypass valve steam traps.

Boshi Valve Company's products include American Standard and National Standard: Globe valves, stainless steel globe valves, ball valves, stainless steel ball valves, plunger valves, plug valves, gate valves, butterfly valves, needle valves, pressure reducing valves, electric valve actuators, welded, threaded, etc.

Inverted Bucket Steam TrapImported National Standard BX991 BX995Detailed Information

The inverted bucket steam trap operates on the principle of density difference between condensate and steam. Its internal structure consists of a lever system connected to an inverted bucket, which overcomes steam pressure to open and close the valve. The inverted bucket, with its opening facing downward, serves as the liquid level sensing component. When the system starts, air and low-temperature condensate are present in the pipeline, and the trap is fully open, allowing rapid discharge of air and condensate, quickly raising the system temperature. When steam enters the inverted bucket, it creates buoyancy, lifting the bucket and closing the valve via the lever. A small hole in the bucket allows automatic air venting. As some steam escapes through the hole and the rest condenses, the bucket loses buoyancy and sinks, opening the valve again. This cycle repeats, enabling intermittent drainage.

\Inverted Bucket Steam TrapImported National Standard BX991 BX995Product Structural Features

All moving parts in the inner cavity are made of stainless steel, ensuring wear and corrosion resistance.

No steam loss occurs as steam cannot reach the water-sealed valve seat orifice, making it highly energy-efficient.

The inverted bucket design prevents crushing and damage, resists water hammer, and ensures long service life.

An air vent hole at the top of the inverted bucket ensures continuous air venting, preventing cold lag and air locking.

Unaffected by backpressure, it operates efficiently even under high backpressure conditions.

Reliable operation with only two moving parts (lever and inverted bucket), eliminating jamming risks.

The valve seat and disc are located at the top, allowing impurities to pass during opening and closing, providing self-cleaning and avoiding clogging.

Applications: Textile printing and dyeing, food and beverage, pharmaceutical and chemical, rubber tires, environmental water treatment, cleaning and disinfection, etc.

Cast IronInverted Bucket Steam TrapImported National Standard BX991BX995Detailed Information

Models:

BX991 steam trap, BX992 steam trap, BX993 steam trap, BX994 steam trap, BX995 steam trap, BX996 steam trap

Size: DN15 to DN80 Connection: Flange Operating temperature: 0 to 230°C Operating pressure: 5K, 9K, 14K, 17K

Parameter configuration:

Nominal pressure: 1.6MPa Maximum operating temperature: 230°C Shell test pressure: 2.4MPa Subcooling: ≤3°C

Maximum allowable temperature: 250°C Maximum backpressure rate: 90% Body and bonnet: HT200 Inverted bucket and lever: Stainless steel

Valve seat: Hardened chrome steel Valve core: Stainless steel Strainer: Stainless steel

Applications: Textile printing and dyeing, food and beverage, pharmaceutical and chemical, rubber tires, environmental water treatment, cleaning and disinfection, etc.

Cast IronInverted Bucket Steam TrapImported National Standard BX991BX995Features

Imported national standard inverted bucket steam traps, known for high efficiency, energy savings, low acquisition cost, and long service life, are highly versatile and suitable for low-pressure main steam lines and various heat exchangers.

Resistant to water hammer and equipped with anti-water seal check valves, proven effective in harsh field tests over three years.

Inspection port on the top cover allows installation of a test valve for immediate verification of trap operation.

Low load drip discharge, medium load intermittent discharge, full load continuous discharge.

Optional orifice sizes maintain consistent drainage under different pressures.

Resistant to fouling, with small impurities flushed out through the top orifice.

Continuous non-condensable gas discharge during operation.

High backpressure resistance, suitable for recovery systems.

Not suitable for superheated steam.

Accessories and parts available per customer requirements.

Parts made of stainless steel and hardened chrome steel valve seats for wear and corrosion resistance.

BX991 Series Steam Trap Accessories

Cleaning wire—Stainless steel wire connected to the cover via the bucket vent hole to prevent oil and dirt clogging.

Temperature sensor—Can be installed at the strainer front to monitor internal temperature changes, indicating trap status. Compatible with BX980 and BX990 series.

Drain valve—Allows complete evacuation of steam and impurities from the strainer.

BX991 Series Steam Trap Installation Notes

All BX980 series products must be installed vertically without tilting.

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