Asahi Sunac PD40 Pneumatic Diaphragm Pump

Asahi Sunac PD40 Pneumatic Diaphragm Pump is a four‑model coating pump in the PD40 Series (PD40, PD40L, PD40S, PD40SW) that uses an air‑driven diaphragm mechanism to deliver stable, leak‑free paint transfer in coating lines. It is designed to minimize leaks from packing wear, helping to reduce paint waste and VOC emissions during color changes, and the PD40S variant features a stainless steel (SUS) paint path for enhanced corrosion resistance with water‑based paints. Model specifics include: PD40 with a 1:1 pressure ratio, a maximum paint pressure of 0.7 MPa, a maximum air pressure of 0.7 MPa, and a discharge up to 20 L/min (air inlet G1/4 PF1/4; paint outlet Rc3/8 PT3/8); PD40L increases to a 1:2 ratio, up to 1.0 MPa for both paint and air, and up to 10 L/min discharge (air inlet G1/4 PF1/4; paint outlet G3/8 PF3/8). The PD40S and PD40SW variants weigh 15 kg each, with PD40S offering SUS construction for the paint path and PD40L/PD40 base units listed at 13.5 kg (PD40L) and 8.5 kg (PD40), respectively; dimensions are 470 × 540 × 690 mm for the PD40 and 470 × 640 × 690 mm for the PD40L. A 1.5 kW (2 HP) compressor is specified as the required drive for operation. This PD40 family is built for coating equipment use, delivering reliable performance and easier cleaning within painting and coating workflows.