The Walchem EWN-C31PCURV-S pump is now obsolete and the replacement model is the EWP-150EPC08V-USR-S pump. For reference, the obsolete EWN-C31PCURV-S specifications were:
Series: HV (High Viscosity)
Max Output: 2.4 GPH
Max Pressure: 73 PSI
Pump Head: Glass Fiber Reinforced Polypropylene
Valve Seats: PCTFE
O-Rings: FKM
Valve Balls: 316 Stainless Steel
Diaphragm: PTFE (+ EPDM Backer)
Gaskets: PTFE
Tubing: 1/2” OD PE Discharge x 1/2” ID Flex Tube Suction
Electrical: 115 VAC, 50/60 Hz
Control Module: Digital Speed Control, Manual Stroke Adjustment, External Pulse & Analog Input