SandPIPER® Pumps are air -driven, double-daphragm pumps. The simple design and operation offer many advantages over other types of pumps.

Pumps abrasive and shear-sensitive materials
Low internal velocities move abrasives easily, with no damage to the pump. The gentle pumping action does not sheer fragile materials.

Pumps viscous materials
Even heavy or solid-laden materials can be pumped. SandPIPER® Pumps move everything from water to peanut butter.

Sealless, with no motors
These air-driven pumps, with no motors, seals or packing to leak, are environmentally friendly.

Self-priming
The pumps are able to dry prime under most suction lift and flooded suction conditions.

Variable flow
Simply regulate the inlet air supply to adjust the pump flow from zero to maximum capacity.

  

Optional porting
Many discharge porting options are available, including top, bottom, side and dual.
• Select top porting fro thin liquids, or if entrained air could be a problem.
• Select bottom porting for thick or solids-laden materials.
• Select side or dual porting for specialized applications.

Runs dry without damage
SandPIPER® Pumps can run dry without damage, unlike other types of pumps.

Deadheads against closed discharge
Excessive back pressure stops pump without damage. No need for expensive bypass system or pressure relief valves. Pump simply stops operation until discharge opens.

Explosion-proof
Air-operation eliminates sparking concerns associated with other electrical or rotating pumps.

Warren Rupp® builds air-operated SandPIPER® Pumps for applications in nearly every industry:

  • Chemical handling, including caustic, toxic and corrosive materials.
  • Process industries.
  • Automotive
  • Sludge and slurries
  • Paint, coatings and surface finishing
  • Ceramic glaze and slip
  • Industrial and municipal waste
  • Food and pharmaceutical processing
  • Marine
  • Construction and utilities
  • Mining
    ..........And more!
 
  Basic Design Features
Most Warren Rupp® diaphragm pumps are driven by compressed air. The directional air distribution valve and pilot valve, referred to as the "air end", are located in the center section of the pump. Liquid moves through tow manifolds and outer chambers of the pump, referred to as the "wet end". Generally, check valves (ball-type or flap-type) are located at the top and bottom of each outer chamber or on a common manifold. The two outer chamber are connected by suction and discharge manifolds. The pumps are self-priming.
 
 

No-Lube Air Distribution Valve
During operation, the Air Distribution Valve controls alternate pressurizing of one diaphragm, then the other. The Valve automatically transfers air pressure to the opposite chamber after each stroke. This provides alternating suction and discharge strokes, as the diaphragms move in parallel paths. Warren Rupp air valves require no lubrication. This is the preferred mode of operation. Clean, dry air will enhance pump performance

Diaphragms
Flexible diaphragms are clamped at their outer perimeters, between the inner and outer chambers. The diaphragms are connected at their movable centers by a rod.

  
Flap Valve Model (Bottom discharge) Left chamber is on a discharge stroke. Right chamber is on a suction stroke.
  

Check Valves
As fluid moves through the pump, check valves open and close. This allows each outer chamber to alternately fill and discharge. The check valve respond to differential pressures. Ball-type check valves can pass very small particles. Flap-type check valves will pass soft solids to nearly line size.

The Pumping Cycle
As the Air Distribution Valve directs pressurized air to the left diaphragm, the diaphragm is pushed outward.This is a discharge stroke, which forces liquid from the left outer chamber. Discharge liquid moves from the chamber, through an open discharge check valve, and exits the pump at the discharge manifold. The position of the discharge port can be top, bottom or side. As the left diaphragm is pressurized outward, the connecting rod pulls the right diaphragm inward on a suction stroke, which fill the left chamber with fluid. Liquid enters the pump at the suction manifold, moves through an open suction check valve and fills the chamber. At the end of the cycle, the AIr Distribution Valve automatically shifts the air pressure to the opposite diaphragm, imitating another pumping cycle.

  
Ball Valve Model (Top discharge) Left chamber is on a discharge stroke. Right chamber is on a suction stroke.
   
Right chamber is on a discharge stroke. Left chamber is on a suction stroke.
    
Right chamber is on a discharge stroke. Left chamber is on a suction stroke.
 
 
 
 
 
Guaranteed No-Stall, Or Your Money Back!
Qarren Rupp's exclusive Externally Serviceable Air Distribution System (ESADS+Plus) has shown superior durability in severe operations around the world. This tough air valve design is standard equipment on most Warren Rupp pumps. Lube-free and in-line serviceable, ESADS+Plus is GUARANTEED to perform, or we'll replace it free of charge.