ChemSafe 307 Air-Operated Double Diaphragm Pumps


  • Precision fit and superior chemical containment
  • Ideal for corrosive and abrasive chemicals
  • Removable air motor for easy maintenance



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 moulded 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


  • Antifreeze
  • Gelcoats
  • Asphalts
  • Polyurethane
  • Windshield Washer Fluid
  • Diesel Exhaust Fluid (DEF)
  • Detergents
  • Water – Wastewater Treatment
  • Water – Wastewater Transfer
  • Food & Personal Care
  • Inks and Colorants


  • Chemical Transfer
  • Medium-Viscosity Material Transfer
  • Low-Viscosity Material Transfer
  • Ink Transfer


ChemSafe 307 Diaphragm Pump
Maximum fluid working pressure
0.69 MPa, 6.9 bar
Minimum air startup pressure
0.21 MPa, 2.1 bar
Fluid inlet and outlet size
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: 9.5 m, Dry: 3 m
Maximum size pumpable solids
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.
0° C
Air consumption at maximum flow
0.26 scmm
Fluid flow per cycle
0.04 liters
Maximum free-flow delivery
25.4 lpm
Maximum pump speed
610 cycles per minute
2.7 kg
Wetted Parts
Maximum fluid temperature
PTFE Pumps
100° C
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
At 610 cycles per minute
58.1 dBa
Sound Pressure
At 100 cycles per minute
61.5 dBa
At 610 cycles per minute
67.7 dBa

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