These 1-inch motor speed pumps have long been popular for cylinder filling, small volume motor fueling and supplying small vaporizers. They offer the same heavy-duty construction of larger Blackmer models and are available in two mounting styles and capacity ranges. The LGF1 model is fitted with an integral bracket and coupling for direct flange mounting to a NEMA C-face motor. This bracket also allows the pump body to be rotated to simplify hookup to piping systems. The LGB1 model is equipped with a coupling and bracket for mounting to a conventional base. The LGF1 and LGB1 models will handle up to 10 U.S. gpm (38 L/min). The LGF1P and LGB1P models offer 50% greater capacity and will handle up to 15 U.S. gpm (57 L/min). All models have 1-inch NPT tapped ports and use an exclusive "combination" valve that acts as both a back-to-tank bypass valve and as an internal relief valve. This feature lowers installation costs by eliminating the need for a separate bypass valve. It also assures pressure relief if the back-to-tank bypass line is closed. Standard construction materials for these models include Buna-N mechanical seals and Duravanes for handling both LP gas and anhydrous ammonia. Maximum differential pressure is 125 psi (8.62 Bar) for both models.
Unit of Measure
Assembled Pump Units (Factory Relief Valve Settings)
Pump and Motor Speed
Approx. Delivery of Propane at Differential Pressures and Pump Speed (50 PSI (3.45 Bar))
Approx. Delivery of Propane at Differential Pressures and Pump Speed (100 PSI (6.89 Bar))