Graco Inc.

ChemSafe 205 Air-Operated Double Diaphragm Pumps  0.25 inch High Purity Pumps

Chemical transfer pumps with 1/4 inch (6.3 mm) connection available in PTFE and UHMWPE

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Graco's ChemSafe pumps feature PTFE or UHMWPE (ultra high molecular weight polyethylene) corrosion-resistant fluid paths, which make them ideal for corrosive and abrasive chemicals. There's no exposed metals and they can be configured in various materials to meet most abrasion, temperature, and chemical compatibility requirements. Plus they're dead-head capable and achieve high flow rates while minimizing air consumption and operational noise.

  • Max flow rate of 3.6 gpm (14 lpm)
  • High quality machined design provides a precision fit and superior chemical containment compared to molded pumps
  • Corrosion-resistant exterior with no exposed metal reduces maintenance, extends pump life and offers clean, safe operation
  • Removable air motor offers easy and intuitive maintenance ensuring maximum pump performance and availability
  • Ideal for corrosive and abrasive liquids such as acids, fuels, glues, paints, resins, inks, or wastewater
  • Use our Online Chemical Compatibility Guide to select the proper pump material for your chemical

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ChemSafe 205 Diaphragm Pump
Maximum fluid working pressure
100 psi
0.69 MPa, 6.9 bar
Minimum air startup pressure
30 psi
0.21 MPa, 2.1 bar
Fluid inlet and outlet size
1/4 npt
1/4 bspt
Maximum suction lift (reduced if balls don’t seat well due to damaged balls or seats, lightweight balls, or extreme speed of cycling)
Wet: 31.2 ft, Dry: 6.5 ft
Wet: 9.5 m, Dry: 2 m
Maximum size pumpable solids
0.12 in.
3 mm
Minimum recommended ambient air temperature for operation and storage. NOTE: ChemSafe pumps may be operated in low temperature environments. Take care to avoid freezing or crystallization of the fluid inside or outside of the pump. Running the pump at temperatures below freezing may accelerate the wear of the elastomer components in the pump.
32° F
0° C
Air consumption at maximum flow
6.8 scfm
0.19 scmm
Fluid flow per cycle
0.008 gallons
0.03 liters
Maximum free-flow delivery
3.7 gpm
14 lpm
Maximum pump speed
462 cycles per minute
462 cycles per minute
Weight
4.1 lb
1.9 kg
Wetted Parts
PTFE, EPDM, NBR, UHMWPE
PTFE, EPDM, NBR, UHMWPE
Maximum fluid temperature
PTFE Pumps
212° F
100° C
UHMWPE Pumps
158° F
70° C
Noise (dBa), Sound power was measured per ISO-9614–2: 1997. Sound pressure was tested 3.28 ft (1 m) from the equipment.
Sound Power
At 100 cycles per minute
61 dBa
61 dBa
At 450 cycles per minute
64 dBa
64 dBa
Sound Pressure
At 100 cycles per minute
70 dBa
70 dBa
At 450 cycles per minute
74 dBa
74 dBa