Plastic and new metallic stainless steel and aluminium pumps

Citation

(1999), "Plastic and new metallic stainless steel and aluminium pumps", Circuit World, Vol. 25 No. 2. https://doi.org/10.1108/cw.1999.21725bad.001

Plastic and new metallic stainless steel and aluminium pumps

Plastic and new metallic stainless steel and aluminium pumps

Keywords Pumps, Serfilco

Serfilco has introduced a new range of pumps that will self-prime and run-dry without damage (Plate 1). They are non-electrical and provide an infinitely variable flow rate.

Plate 1 Air diaphragm pump

The manufacturer claims that air diaphragm pumps are four times better because of the following combined list of features:

1. 1.

   Non-stall. The air supply maintains a constant pressure throughout the discharge stroke preventing the spool/shuttle moving into neutral.

2. 2.

   Lube-free. The air system and shuttle mechanism are manufactured from lubrication filled materials to virtually eliminate friction.

3. 3.

   Non-freeze. Stalling due to ice formation in the air system is eliminated due to the insulating properties of all plastic air valve mechanism. Also its ability to slow the air expansion without compromising performance.

4. 4.

   Quick clamp. This closure provides ease of maintenance and maintains a positive continuous seal. Problems with bolted designs include uneven torque, leading to leakage and time consuming maintenance.

Plastic pumps are available in polypropylene and PVDF with nitrile, EPDM or PTFE faced diaphragms for the ultimate in chemical corrosion resistance. Size range 0.25in., 0.5in., 1in. and 2in..

The newly introduced metallic pumps are available in aluminium and 316 stainless steel. They have diaphragm and elastomer sealing material choice similar to the plastic models, size range 1in., 1.5in. and 2in.. Flow range from zero up to 500l/min (30m³/hr).