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	PRICE air-operated double diaphragm pumps can move anything from fine chemicals (gentle, non-shearing action), to abrasive and viscous slurries (no close-fitting parts, low internal velocities), and almost any other product that can move. A few of the thousands of products now being pumped:
	Paints & solvents Pigments Resins Construction water & waste Beer & wine Mine tailings Chemicals Oils & lubricants Glues & adhesives Dyes	Foods Tanker loading/unloading Marine barges Ceramic slips, slurries & glazes Latex Driller's mud Inks & printing liquors Against filter press Low density powders

PRICE time-tested design will save you money, trouble and downtime. Some of the performance features include:

Can run dry indefinitely without damage.
No shaft seals or gland packing.
Infinitely variable flow & discharge pressure from 0 to pump's maximum by adjusting air pressure.
Gentle non-shearing action.
If discharge is clogged or closed pump stops immediately; no power consumed, no heat, no wear. By opening discharge, flow starts automatically.
Operates submerged or with flooded suction.
Self-priming from a dry start.
Pressures up to 100 PSI (7 bar).
No close fit, sliding or rotating parts. Low internal velocity reduces wear.
Quick assembly/disassembly with split clamp bands.
Capable of pumping at high temperatures.
Quiet, steady discharge flow without use of pulsation dampener.
Safe for use in explosive environments. No electrical hazards or costly motor and control equipment needed.
No pressure relief or bypass piping required because pump pressure never exceeds air inlet pressure.
Pollution-free operation. The PRICE pump even improves air environment in confined areas.

PRICE air-operated double diaphragm pumps

The air valve directs pressurized air to the back side of diaphragm 1. The compressed air is applied directly to the liquid column separately by elastometric diaphragms. The diaphragm acts as a separation membrane between the compressed air and the liquid. Driving the diaphragm with air instead of the shaft balances the load and removes mechanical stress from the diaphragm, dramatically extending diaphragm life. The compressed air moves the diaphragm away from the center block of the pump.

The opposite diaphragm is pulled in by the shaft connected to the pressurized diaphragm. Diaphragm 2 is now on its air exhaust stroke; air behind the diaphragm has been forced out to atmosphere through the exhaust port of the pump. The movement of diaphragm 2 toward the center block of the pump creates a vacuum within chamber 2. Atmospheric pressure forces fluid into the inlet manifold forcing the inlet valve ball off its seat. Liquid is free to move past the inlet valve ball and fill the liquid chamber.

The heart of the Double Acting Air Operated Diaphragm Pump is the air valve which shifts the air supply to both diaphragms alternately with complete reliability under all conditions of head and flow. The air valve performs this function with a simplicity in design and serviceability.

Exclusive Air Valve
The only moving part with metal to metal contact, Air Valve, is the hard anodized aluminium piston. This single moving part is lubricated by oil mist picked up by the incoming air supply to the pump.

PRICE Pumps give dependable, top performance in the most rugged pumping jobs.
Up to 50% solids and over 30 m. are no problem for the Pump. Compressed air is applied directly to the liquid column separated by elastomer diaphragms. This balances all the liquid, slurry load, removes the mechanical stress from the diaphragms to allow high heads and thousands of hours of diaphragm life.
The pumping volume is controlled by easy inlet air valve, from a few lit. per hour to over thousand lit. per hour with the same unit. A by pass valve is not required because the pump stops when discharge pressure equals air inlet pressure. The pump can also run dry indefinitely without damage. Our double diaphragm design cuts velocity through the pump to half total discharge velocity. The most abrasive slurries produce little wear effect on pump parts.

Polypropylene
Cast Iron
Cast Aluminium
S. S. 316
Teflon (PTFE)

Diaphragms & NRV Balls are offered in different elastomers.
Neoprene
EPDM
Nitrile
PTFE
Hypalon

Accessories:

1) F.R.L : Air Filter, Regulator and Lubricator are required in Air line to provide clean, moist free air at constant pressure to the pump. FRL also helps to lubricate air valve assembly (connecting shaft and piston).

2) Needle valve in brass.
Size available ¹/₄", ³/₈", ¹/₂".
Pressure -10 kg/cm².


		POLYPROPYLENE
		HEIGHT : (in mm)	635
		WIDTH : (in mm)	406
		DEPTH :(in mm)	304
		WEIGHT : (in kg.)	18
		AIR INLET : (in BSP)	3/8"
		SUCTION : (in mm)	40
		DISCHARGE : (in mm)	40
		SUCTION LIFT : (in m.)	3
		Max. Solid Size. (in mm)	10


		POLYPROPYLENE
		HEIGHT : (in mm)	787
		WIDTH : (in mm)	483
		DEPTH :(in mm)	368
		WEIGHT : (in kg.)	30
		AIR INLET : (in BSP)	1/2"
		SUCTION : (in mm)	50
		DISCHARGE : (in mm)	50
		SUCTION LIFT : (in m.)	4
		Max. Solid Size. (in mm)	15