Watson-Marlow 521VI/RELC, 521I/RELC, 521F/RELC, 521FX/RELC: 0-2 bar IP55 pumps fitted with LoadSure® low-pressure element pumpheads.
521 close-coupled pumps offer IP55 ingress protection for industrial environments. They offer rugged, industrial pumping, with all the pumphead features of cased drives, but at the lowest whole-life cost.
520REL low-pressure LoadSure element pumphead features large swept volume with sprung rollers for high accuracy
Chemically-resistant polyphenylene sulphide track and rotor, and stainless steel rollers and bearings
Low rotational speeds significantly increase tube life and system reliability
Clutched rotor for rapid, effortless tube loading
Rugged, tool-unlockable guard
Pumphead options available as standard (others available on request):
520R and 520R2 pumpheads for continuous tubing
520REL, 520REM and 520REH pumpheads for tube elements (for low, medium and high pressures)
501RLCA and 501RL2CA ATEX pumpheads for continuous tubing
Drive options available:
521VI integral inverter
521F fixed speed
521FX duplex fixed speed
521I inverter controlled
Features and benefits
520RELC pumphead features PPS (Polyphenylene Sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear
Heavy-duty pumphead construction with impact-proof safeguard
Sprung rotor gently compresses tubing using large low friction rollers with sealed bearings, guaranteeing long tube life and accurate metering
Fast and simple pumphead set-up using a clutched rotor for effortless element loading