Tuthill # 4C2FNV-C-A Rotary Gear Pump

The Tuthill 4C2FNV-C-A is a Cast Iron Rotary Gear Pump, Pump End Only, no motor, Flange Mount, with Outboard Ball Bearing, Internal Relief Valve, Relief valve is set at 90 PSI (can be adjusted in field), Clockwise rotation only (from shaft end view), A-type Tang Shaft, and 1-1/2 Inch NPT by 1-1/2 Inch NPT ports. This pump was specifically developed for flange mounting applications and for close coupling to Tuthill's special motors to provide extremely compact close-coupled combinations. This pump is supplied with a single spring-loaded lip seal, and can handle inlet pressures to 25 PSI, and has a maximum differential capability of 100 PSI. This pump has an outboard ball bearing and was specifically developed for use with belt drives or similar applications were a side load is applied to the pump shaft. Tuthill CF Series cast iron pumps employ the internal gear pumping principle. There are only two moving parts, and the pumping action is based on a rotor, idler gear, and crescent shaped partition cast integral with the cover. This pump has an internal relief valve, and the adjusting screw of the relief valve is located on the suction side of the pump. The internal relief valve on this pump is designed for over-pressure protection only. It is not intended as a flow control device or for any similar use. Continuous operation of the relief valve will result in excessive heat buildup within the pump cavity that could cause serious internal damage. Make certain the adjusting screw of the relief valve is located on the suction side of the pump. Unless otherwise specified at the time of order, this pump is supplied with the standard spring, with a range of 30-225 psi, set to provide full bypass relief at 90 psi. This pump should not be used for handling plain water, corrosive or abrasive liquids or liquids not possessing adequate lubricity. Do not run the pump dry, as this could cause severe damage to the internal seal, bushings and/or metal parts.