Semi-hermetic and hermetic refrigeration pumps – WITT

The German company WITT is a family company founded in 1896. and with over 125 years of experience in industrial refrigeration is a leading manufacturer of float refrigeration pumps and pressure regulators.

WITT has the following products in its industrial refrigeration product range:


– Cooling pumps (open, with coupling and flange for electric motor mounting) GP series with models GP 41, GP 42, GP 51, GP 51A, GP 52i GP 82

– Cooling pumps (hermetic) series HRP with models HRP 3232, HRP5040, HRP 5050, HRP 8050 and HRP 10080

– Float regulators series HR and HS, flange regulators with float series HSF, economizers ECO 2, ECO3 and ECO 4

– Separators, receivers, thermosyphon collectors

– Pumping stations, evaporators, CO2 cascade systems

– BDP series oil recovery devices, stainless steel oil receivers, DWR series heat exchangers

– Additional components: valves and fittings for valves, fittings for pressure switches, manometers, differential manometers, sight glasses

WITT refrigeration pumps have proven their value in industrial refrigeration plants around the world for decades, especially in the work with ammonia refrigerant (NH3) and are the first choice of designers and contractors in ammonia refrigeration systems.

A key feature of WITT refrigeration pumps is their proven ability to pump liquid / vapor mixture; this is especially important in cases where the evaporation temperature of the coolant decreases.

In the WITT program of refrigeration pumps, a special place is occupied by the series of open pumps GP 41/42 and GP 51/52 with electric motors which are available in several variants and which are selected depending on the refrigerant (ammonia, freon, etc.) as well as a series of hermetic HRP pumps.

MASTER FRIGO SALES has in stock open refrigeration pumps GP 41/42 and GP 51/52 with electric motors designed to operate refrigeration pumps with ammonia as a refrigerant as well as most basic spare parts for servicing GP series refrigeration pumps. For individual projects, Master Frigo Sales imports dedicated WITT components such as HR / HS float controllers, HRP hermetic pumps, GDP oil recovery devices and other components from WITT’s product range.