Graco Inc.

ChemSafe 307 Air-Operated Double Diaphragm Pumps  0.375 inch High Purity Pumps

Chemical transfer pumps with 3/8 inch (9.5 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 7.9 gpm (30 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

ChemSafe 307 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
3/8 npt
3/8 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: 10 ft
Wet: 9.5 m, Dry: 3 m
Maximum size pumpable solids
0.08 in.
2 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
9.3 scfm
0.26 scmm
Fluid flow per cycle
0.011 gallons
0.04 liters
Maximum free-flow delivery
6.7 gpm
25.4 lpm
Maximum pump speed
610 cycles per minute
610 cycles per minute
6 lb
2.7 kg
Wetted Parts
Maximum fluid temperature
PTFE Pumps
212° F
100° C
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
51.7 dBa
51.7 dBa
At 610 cycles per minute
58.1 dBa
58.1 dBa
Sound Pressure
At 100 cycles per minute
61.5 dBa
61.5 dBa
At 610 cycles per minute
67.7 dBa
67.7 dBa