TR-20-PTT-7V

Tapflo TR20-PTT-7SV Pump

The Tapflo TR-20-PTT-7V (TR20-PTT-7SV) Diaphragm Pump is a highly durable air-operated double diaphragm (AODD) pump designed for transferring aggressive chemicals, corrosive liquids, slurries, viscous fluids, and process liquids in demanding industrial applications. The pump utilizes compressed air as the driving force and operates without electrical components at the pump head, making it suitable for environments where electrical equipment may present operational constraints.

The pump employs two flexible PTFE diaphragms connected by a common shaft. As compressed air alternately moves each diaphragm, liquid is drawn into one chamber while simultaneously being discharged from the opposite chamber, creating a smooth and dependable pumping cycle. This positive displacement principle enables the pump to maintain accurate liquid transfer even when handling abrasive, shear-sensitive, viscous, or solid-laden fluids.

Its seal-less construction eliminates conventional shaft seals and substantially reduces leakage risks. The pump is capable of self-priming, dry running, and dead-head operation without damage, making it exceptionally reliable for industrial process systems where operating conditions frequently vary.

The chemically resistant thermoplastic body combined with PTFE wetted components provides excellent resistance to a broad spectrum of acids, alkalis, solvents, and specialty process chemicals. The modular construction allows rapid maintenance and simplified replacement of wear components, reducing downtime and lifecycle costs.

Detailed Construction Features

Pump Body Construction

• Heavy-duty thermoplastic construction.
• Excellent corrosion resistance.
• Lightweight and durable design.
• Suitable for aggressive process chemicals.
• Impact-resistant industrial structure.

Diaphragm Assembly

• Twin PTFE diaphragm arrangement.
• High chemical resistance.
• Long flex life.
• Leak-free liquid separation.
• Suitable for abrasive and corrosive fluids.

Air Valve System

• Efficient non-stalling air distribution mechanism.
• Reliable reciprocating operation.
• Reduced compressed air consumption.
• Smooth cycle transition.
• Low maintenance design.

Ball Check Valve System

• Self-acting check valves.
• Positive suction and discharge control.
• Reliable priming characteristics.
• Consistent volumetric efficiency.
• Suitable for solids-containing fluids.

Fluid Chamber Design

• Smooth internal flow passages.
• Reduced pressure losses.
• Easy cleaning capability.
• Optimized flow efficiency.

Operating Characteristics

Performance Features

Hydraulic Features

• Accurate liquid displacement.
• Stable flow characteristics.
• Gentle product handling.
• Pulsation-controlled pumping action.
• Effective suction lift capability.
• Reliable transfer of difficult fluids.

Mechanical Features

• Seal-less construction.
• Low maintenance requirements.
• Few rotating components.
• Extended service life.
• High operational reliability.

Safety Features

• Air-operated design.
• No electric motor at pump head.
• Safe dry running.
• Overload-resistant operation.
• Suitable for hazardous process environments.
• Leak-minimizing diaphragm isolation system.

Materials of Construction (Typical)

Typical Applications

Chemical Industry

• Acid transfer.
• Alkali transfer.
• Chemical dosing.
• Solvent handling.
• Specialty chemical processing.

Water Treatment

• Chemical injection systems.
• Coagulant transfer.
• pH correction systems.
• Sludge transfer.

Pharmaceutical Industry

• Process liquid transfer.
• Chemical handling.
• Product batching operations.

Paint and Coating Industry

• Paint circulation.
• Pigment transfer.
• Resin pumping.

Food and Beverage Utilities

• CIP chemical circulation.
• Additive transfer.
• Utility fluid handling.

General Industrial Applications

• Slurry transfer.
• Wastewater treatment.
• Filter press feeding.
• Tank unloading.
• Drum transfer systems.

• Advantages
• Self-priming operation.
• Dry-running capability.
• Seal-less design.
• Excellent chemical resistance.
• Handles solids-containing liquids.
• Suitable for abrasive fluids.
• Variable capacity control.
• Low maintenance requirement.
• Easy installation.
• Compact footprint.
• Reliable continuous operation.
• High process flexibility.

• Standard Scope of Supply
• TR-20-PTT-7V Pump Assembly
• PTFE Diaphragm Set
• Ball Check Valve Assembly
• Air Distribution Valve System
• Fluid Chamber Assembly
• Connection Hardware
• Mounting Arrangement
• Operation and Maintenance Manual

Model Identification

The Tapflo TR-20-PTT-7V (TR20-PTT-7SV) is an industrial air-operated double diaphragm pump featuring thermoplastic construction, PTFE diaphragms, PTFE valve components, self-priming capability, dry-running operation, seal-less design, and excellent resistance to aggressive chemicals. The pump is suitable for chemical transfer, dosing, slurry handling, wastewater treatment, pharmaceutical processing, and general industrial fluid transfer applications where reliability, chemical compatibility, and maintenance simplicity are critical requirements.

Note: Exact values such as maximum flow rate, maximum discharge pressure, suction lift, air consumption, connection sizes, weight, dimensions, and temperature limits depend on the specific supplied configuration and should be verified from the project annexure, approved datasheet, or manufacturer-certified documentation.

Specifications