Thermostatic Steam Traps

Thermostatic Steam trap works on the difference in Enthalpy of Steam and Condensate. A capsule attached to a Bellow filled with precise amount of a Hydrocarbon, Expands and contracts in response to the rising/lowering of Enthalpy. Thereby shutting and opening the valve. Condensate has lower Enthalpy, causing the bellow to contract and the seat to retract which opens the valve and allow discharge of condensate. The reverse happens with the steam and its higher Enthalpy.

These traps used largely on Tracing lines or Tank Farms where steam is supplied to maintain Temp / viscosity of the Oil.

UKL Thermostatic trap has a unique Simple design, Minimum number of components and where the Bellow is enclosed and protected thus ensuring long life for the Bellows

Enquire Now

Operating Animation

MOC: Forged Carbon Steel and Stainless steel.
Sizes: 15 mm – 25 mm.
End connections: Screwed/Socket weld ends.
For Max Press up to 31 bar and Max. Temp 300Deg.C.

Available in Sub Cooling Temp of 10 -15Deg. C.

UTST

UKL Thermostatic Steam Trap in Forged carbon steel construction as per ASTM A 105

Metric
Imperial

Size (NB)

Max. Op. Pr / Temp (kg/cm2 / oC)

End connections

Optional /Additional information

15 to 25

32 / 400

Screwed-BSP/BSPT/NPT

Socket weld

Flanged #150/#300(weld-on)

IBR / Non-IBR

Flanged #600

Datasheet (Metric)

Instruction Manual (Metric)

1. What is a steam trap? Explain its purpose.

As the name suggests, a Steam Trap is a device which allows Condensate to pass through it, while trapping live Steam. Steam Trap is used to drain out the condensate in steam network, formed due to heat loss or heat transfer, without live steam loss.

2. What exactly a steam trap does? Or Why is it required?

A steam trap does the following multiple work:
1) It Allows venting of air or non-condensable gases present in steam network(especially during start-up)
2) It Traps live steam
3) It Discharges the condensate(formed due to condensation)
It is required at one or numerous locations to,
1) Avoid water hammer in steam pipes and other equipments
2) Improve the heat transfer capabilities of equipments
3) Avoid excessive corrosion and pitting

3. How many types of Steam Traps are there? Explain operating principle of each.

There are 3(three) types of steam traps
1) Thermodynamic(disc) type:
Operating principle :- It works of Bernoulli’s principle (Kinetic energy/velocity)
2) Thermostatic(bellow) type
Operating principle :- It works of thermal(temperature) principle
3) Mechanical(Float and bucket) type
Operating principle :- It works of Buoyancy principle

4. What is the meaning of FOS or safety factor while selecting steam trap?

FOS or Safety factor is related to the discharge capacity of steam trap. Every steam trap is designed to meet a predefined discharge capacity at corresponding differential pressure. But if actual rate of condensation is higher at some plant locations due to conditions of start-up or similar conditions, we must consider FOS or safety factor to meet these extra demands of condensate discharging.

5. Should the steam traps be insulated?

Insulation of steam traps is not recommended with few exceptions However, it depends on the operating principle of steam trap. Please note, insulation means Thermal insulation
1) Thermodynamic Type : Insulating should be limited to Ice & Rain fall from top cover side only
2) Thermostatic Type : Not recommended at all
3) Mechanical Type : Float & Bucket type are mechanical traps. Not recommended for this type too

Salient Features

List of Salient Features:

MOC: Forged Carbon Steel and Stainless steel.
Sizes: 15 mm – 25 mm.
End connections: Screwed/Socket weld ends.
For Max Press up to 31 bar and Max. Temp 300Deg.C.