Units & Conversions

Converting Fluid Ounce to Cubic Inches

• Fluid Ounces (fl.oz.) = Cubic inches (cu.in.) x 0.554
• Cubic inches = Fluid Ounces / 0.554
• 1 Gallon = 128 fluid ounces

Flow Rate - How fast will the pump raise the cylinder?

The flow rate is the amount of oil, the pump delivers to the cylinder (… for hand pumps with one hand stroke, … for electric and air pumps per minute). The larger the flow rate, the faster the cylinder will rise. Some pumps are equipped with double speed: With the cylinder unloaded, the pump delivers a high volume of oil for fast cylinder speed. Once the load is engaged, the pump automatically switches to the slower high pressure lifting stage.

How many hand strokes are required for a hand pump to raise a cylinder?
Hand strokes = Cylinder oil capacity / Oil volume per stroke.

SCFM

SCFM stands for Standard Cubic Feet per Minute. It denotes how much air volume (measured in cubic feet) is needed per minute from an air supply (compressor /shop air) to operate an air over hydraulic pump.

NPTF

NPTF stands for National Pipe Thread Fine. It denotes the inside diameter of a fitting or hydraulic hose. The standard sizes are 3/8 inch NPTF (also referred to as fast flow) or 1/4 inch NPTF.