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