A sophisticated, yet simple, design that will provide years of trouble-free service with no steam loss.

Bestobell Steam’s delta element is a triangular shaped bimetal strip of austenitic and ferritic stainless steels. The materials are joined together using a patented state of the art process of Controlled Atmospheric Bonding. This process assures strong, consistent, and repeatable operation over the life of the trap. This bonded steel is then further processed for additional strength and shaped into the delta pattern and heat-treated to eliminate stresses. This entire process allows the Bestobell Delta Element traps long life with consistent operations.

The single blade design provides faster response than found with typical stacked arrangements due to the large surface/mass ratio. The stem is situated at a point that allows the expansion of the bimetal to exert a linear pull on the stem to prevent uneven wear on the sealing surfaces.

Thermostatic and Thermodynamic Forces Bestobell delta element traps are unique in that they employ a hybrid design that utilizes both thermostatic and thermodynamic principles to achieve a continuous modulating discharge of condensate as it forms, and eliminates live steam loss.

The combination of a temperature-sensitive closing force (thermostatic element) and a pressure-sensitive opening force (thermodynamic valve) overcomes the sluggishness and susceptibility to service failure than can be encountered with traditional bimetallic designs. The valve design utilizes the thermodynamic pressure forces of the flashing steam to provide quick response and a wide operating range closely approximating the steam curve.

Integral Strainers and Check Valves Bestobell Steam saves you the added expense of buying and installing separate strainers and check valves to complete your steam trap station. Most models include a built-in strainer to protect the trap internals from dirt or foreign matter in your steam system.

The valve stem acts as an integral check valve to prevent backward flow of condensate. The Delta Element Trap can operate in applications with back pressures of up to 70% of inlet pressures due to the adjustable design of the element.