FLOW CONTROL PRODUCTS

Inverted Bucket Steam Traps-pt21

Working principle

Inverted bucket steam traps works on buoyancy principle. As the name says, the mechanism consists of an inverted bucket with small hole for air vent on top of it, bucket connected to a valve by a lever.

  • At the initial position the inverted bucket stays in downward position, once condensate enters the steam trap enters it flows through the bottom of the bucket and filling the body, flows away through the outlet.
  • Once the steam enters the trap, it makes the bucket buoyant, it then raises and shuts the outlet.
  • The trap remains shut till the steam condenses, the bucket then sink, pulls off valve from its seat, condensate discharges through the outlet.

Advantages

  • Pennant inverted bucket steam traps are designed to resist higher pressures.
  • These traps can operate well against back pressures.
  • Good resistance to damage against freezing.
  • Resists damage against water hammer. 
  • The valve and valve seat are hardened by a special induction hardening process to withstand continuous, prolonged operation.

Typical Applications of Ball float steam traps:-

  • Heating coils
  • Hot water heaters
  • Steam separators
  • Reactors
  • Sterilizers
  • Autoclaves
  • Dryers
  • Dehumidifiers 
  • Heat exchangers
Available Spares

Valve Seat, Ball Float & Lever Assembly, Air Vent Assembly. Gaskets.

Sizes

DN 15, 20, 25

INSTALLATION

The inverted bucket trap must be fitted vertically, with the inlet from the bottom and the outlet at the top. Correct vertical fitment is essential for easy movement of the bucket. Care must be taken to ensure that the trap level is below the level of the equipment to be drained. The bypass arrangement should be above the level of the trap. Fitment of a strainer before the trap inlet is recommended to prevent entry of dirt / foreign particles into the trap. Full-port isolation valves should be fitted before and after the trap, to be used when the trap has to be opened for maintenance.

MAINTENANCE

This product has to be removed from the line for maintenance. It is recommended that the trap be opened periodically and the internals inspected for wear, damage, and dirt. All worn or damaged parts should be replaced with new spares. A new internal kit comprising of the valve pin, valve seat, bracket and lever should be replaced as a set. The bucket vent hole should be cleaned.

IMPORTANT

Ensure that the steam trap is primed by opening the inlet valve only a crack, at commissioning, allowing water to fill the trap before the steam enters. The inlet valve should be opened fully only after the trap is filled with water. The trap should be installed as close as possible to the equipment to be drained. For new pipelines, ensure that the lines are properly flushed, prior to fitting the trap.

CONNECTIONS

Screwed (NPT/BSPT/BSP)

Limiting Conditions:

PMA: Max. allowable pressure 250 psig
TMA: Max. allowable temp 428 °F
Maximum operating back pressure at the outlet should not exceed 90% of the inlet pressure
Minimum diff. pressure for satisfactory operation 1.5 psi
Cold hydro test pressure 375 psig

MATERIAL

NO PART MATERIAL QTY.
1. BODY CAST IRON 01
2. COVER CAST IRON 01
3. BUCKET ASSLY AISI 304 with CS reinforcing ring 01
4. VALVE SEAT (Hardened) AISI 410/ 420 01
5. VALVE PIN (Hardened) 01
6. BRACKET AISI 304 01
7. LEVER AISI 304 01
8. PLUG CARBON STEEL 01
9. GASKET Non CAF 01
10. BOLT High Tensile *
11. NUT High Tensile *
12. PIPE CARBON STEEL 01
Note: All internal screws are AISI 304 * Sizes 1/2″, 3/4″ – 6 Nos., 1″, 1 1/2″ – 8 Nos.

Imperial

PMA TMA PMO TMO Capacity Range (lbs/hr) Size
250 psig @ 38 degF 428 degF 250 psig @ all operating temperatures 428 degF 175 ~7050 ½” ¾”1”1 ½”

Metric

PMO (bar) TMA (ºC) Capacity at PMO (kg/hr) Size
17.5 / 220 350 530 2500 2600 DN15 DN20 DN25 DN40
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