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Yarway Series 151 Dual Range Process Traps

Dual Range Process Traps
Series 151

The Series 151 Dual Range Steam Trap is designed for use on both batch and continuous applications such as batch stills, autoclaves, reboilers, storage tanks, shell and tube heat exchangers and tank coils. The Dual Range Steam Traps are capable of handling high startup and running loads, and provide maximum air venting capability.

There are two body styles and two internals available, the 151 angle and 151 in-line. There is a standard capacity internal and an “H’ high capacity internal available. Both internals are interchangeable in both bodies.

Applicable Codes and Standards:
Pressure ratings per ANSI/FCI-69-1. Performance testing per ANSI/ASME PTC-39-1. End connections per ANSI B1.20.1 for threaded ends, per ANSI B16.11 for socketwelding ends.

How to Size:
Required trap flow rate = Maximum expected condensate load (lb/hr) x Safety Load Factor. A safety load factor of 2-4 is usually recommended. Then select a trap from the flow rate chart. Do not size trap based on end connections.

How to Order:
Typical specification – Traps shall be Dual Range type with a combination of welded stainless steel FTE thermostatic pilot valve and fluid-dynamic main valve. Construction shall be forged steel body and stainless steel bonnet with factory calibrated, stainless steel internals, self-adjusting for all pressures to 300 psi [21 bar]. Specify angle or in-line body.

Specify trap size and series. Threaded end connections (socketwelded optional). Repair kits are interchangeable and are supplied as sets of matched parts (seat, seat gasket, screen and preassembled cage assembly).

Pressure and Temperature Ratings:
ANSI Class 300  
Max. Design Temp: 750°F
Operating Pressure: 1-300 psi
Max. Operating Temp: 500°F

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