TLV JH7RH-B Free Float Steam Trap for 10 MPaG Steam

An extreme-pressure Free Float trap in low alloy cast steel

The TLV JH7RH-B is a low alloy cast steel Free Float steam trap for medium-size process equipment where pressure or temperature exceeds what ordinary cast steel traps allow. TLV rates the JH7RH-B up to 10 MPaG at 425 °C, and its sister models JH7RH-P and JH7RH-W reach 12 MPaG at 530 °C. All are offered in 15, 20 and 25 mm with socket-weld or flanged ends, and TLV states they are also suitable for superheated steam. A thermostatic bimetal vent on the B model vents air at start-up, while the P and W models replace it with a threaded cover plug or a cover socket connection.

Technical specifications

Where the JH7RH is used

TLV describes this body as suitable for superheated and extremely high-pressure applications, which places it beyond the ratings of standard cast steel (WCB) traps such as the JH5 types. The self-modulating float gives continuous low-velocity discharge, and the constant water seal with three-point seating keeps the trap steam-tight even under no load. Air venting differs by variant: choose JH7RH-B when cold start-ups need automatic venting, and JH7RH-P or JH7RH-W for the highest pressure and temperature, where the cover plug or socket replaces the vent. Related models in TLV’s JH group include the JH7RL-B (4.6 MPaG), JH7RM-B (6.5 MPaG) and JH7RH-P (12 MPaG at 530 °C).

Selection and documents

TLV recommends a safety factor of at least 1.5 on condensate load and warns not to exceed the maximum differential pressure, since condensate will back up. Capacity data assumes continuous discharge of condensate 6 °C below saturation temperature. Compare with the lower pressure or browse the steam trap category. The attached TLV specification sheet (Rev. 9/2024) lists materials by part, dimensions and capacity charts. Send pressure, temperature, end connection and weld standard with your enquiry, and confirm the model code against current TLV documents before ordering.