Alfa Pumps [P] Limited supplies Vertical Gland / Seal Less Pump. Alfa Pumps [P] Limited manufactures on-metallic chemical process pumps under registered brand name of ALFA. Vertical Gland / Seal Less Pump is available in hydraulic design to any conventional centrifugal pump, it differ in, so far as restriction is provided, escape by way of an overflow Connection in the upper pump body & return to the suction line. Vertical Gland / Seal Less Pump is a preferred selection for E.T.P because of seal less design. This vertical pump is recommended for transfer of treated effluent. This pump runs at 2880 RPM.