No Seal - No Leakage Path
The diaphragms separate fluid from the air side, so there is no rotating shaft passing through a seal chamber. That removes the main leakage path found in sealed motor-driven pumps.
ADD Series
Air-Operated - No Electric Motor at Pump
Air Operated Double Diaphragm Pumpfor Sealless Industrial Transfer
Sealless positive displacement \u00B7 Air-operated \u00B7 Up to 1000 LPM \u00B7 Solids up to 9.5 mm \u00B7 PP / PVDF / SS316 / Aluminium
The ADD Series air operated double diaphragm pump from Shubham Industries, Ahmedabad, is a sealless positive displacement pump driven entirely by compressed air. With no electric motor at the pump, no mechanical seal, and no rotating shaft through the liquid chamber, it handles corrosive chemicals, abrasives, viscous products, solids-laden fluids, solvents, food liquids, sludge, and industrial transfer duties with lower leakage risk than conventional sealed pumps. The published series covers up to 1000 LPM, up to 120 PSI / 8.3 Bar, dry suction lift up to 8.3 m, solids up to 9.5 mm, and port sizes from 1/2 inch to 3 inch. Body MOC options include PP, PVDF, Aluminium, SS304, SS316, SS304L, and SS316L, with diaphragm options in Teflon, Santoprene, and Neoprene. Manufactured at Kuha, Ahmedabad, Gujarat, ISO 9001:2015 certified since 1987.
Flow
Up to 1000 LPM
Pressure
Up to 120 PSI / 8.3 Bar
Solids
Up to 9.5 mm
Drive
Compressed air - no motor
No seal - no leakage - self-priming - run dry capable - can be submerged - ISO 9001:2015 since 1987
Compressed air required. ADD is air-operated and has no motor HP or RPM basis. Final selection depends on air supply pressure, back pressure, suction condition, MOC compatibility, and fluid characteristics.
ADD performance proof
- Drive
- Compressed air - no motor
- Flow
- Up to 1000 LPM
- Pressure
- Up to 8.3 Bar
- Solids
- Up to 9.5 mm
How It Works
How the ADD Air Operated Double Diaphragm Pump Transfers Fluid Without a Seal or Motor
Dry compressed air enters the air valve and drives the two diaphragms alternately. One diaphragm creates the delivery stroke while the other creates suction. Four ball valves work as non-return valves so the fluid moves in one direction only. Because the liquid side is isolated by the diaphragm, there is no mechanical seal and no rotating shaft through the wetted chamber.
Alternating Diaphragm Strokes
Compressed air is directed alternately to each diaphragm. One side delivers fluid while the opposite side creates suction and draws in the next charge of liquid.
1:1 Air Pressure to Discharge Pressure
The pump develops discharge pressure based on available compressed air. More air pressure gives more discharge pressure, and more air volume increases stroke rate and flow.
CONFIGURE ADD SERIES
Configure Your ADD Air Operated Double Diaphragm Pump Requirement
ADD is air-operated, not motor-driven. Use this panel to define compressed-air availability, back pressure, suction condition, solids, and MOC before final diaphragm pump selection.
MOC Selection
ADD Series Body and Diaphragm Material Selection Guide
MOC confirmation is mandatory. Always share fluid name, concentration, temperature, solids, and suction condition before ADD body, diaphragm, and NRV ball selection is finalized.
Body MOC
| PP | General acids, alkalis, solvents, and water where polypropylene compatibility is suitable. |
|---|---|
| PVDF | Aggressive chemicals, oxidizing acids, and halogenated solvents where stronger chemical resistance is needed. |
| Aluminium | General industrial, non-corrosive, oil, and water-transfer duty. |
| SS304 | Food, beverage, water, and mild process fluids. |
| SS316 / SS316L | Chemical, pharmaceutical, and corrosive process duty. |
Diaphragm / NRV Ball MOC
| Teflon (PTFE) | Aggressive chemicals, solvents, acids, and highly reactive fluids. |
|---|---|
| Santoprene | Food, beverage, and pharmaceutical duty where flexible food-grade elastomer is preferred. |
| Neoprene / Buna | General industrial, oils, water, and mild chemical service. |
Connection Guide
| 1/2 inch port | Threaded BSP connection commonly used on the smallest ADD sizes. |
|---|---|
| 1 inch and above | Threaded or flanged connection depending on body construction and duty. |
ATEX/CE symbols may appear in brochure graphics, but site classification and applicable certification must be verified before specifying ADD for hazardous-area installation. Do not assume blanket ATEX certification.
Available Arrangements
ADD Air-Driven Supply Options
PP / PVDF Non-Metallic AODD
Non-metallic body options for chemical duty where PP or PVDF compatibility is preferred and compressed-air operation is required.
Standard Air-Driven AODD
Standard compressed-air diaphragm pump arrangement for general industrial transfer, solvent duty, and sealless process service.
Trolley-Mounted Stainless AODD
Portable stainless air-operated arrangement for washdown, transfer, drum unloading, and plant movement between duty points.
Trolley-Mounted PP AODD
Portable polypropylene air-operated arrangement for corrosive liquid transfer where a wheeled unit improves site handling.
Body construction options
Metallic / Non-Metallic Construction
Body construction is selected around fluid chemistry, portability, and mechanical environment. Final compatibility is confirmed by engineers.
MOC selection guide
Body / Diaphragm / Ball MOC Selection
The body, diaphragm, and NRV ball materials are selected together to match chemical compatibility, solids, and suction performance.
Technical Specifications
ADD Series Technical Specifications
Performance values are based on water at ambient temperature. ADD is air-operated, so no motor HP or RPM field applies. Flow depends on compressed-air volume, suction condition, back pressure, and fluid properties.
| Parameter | Value |
|---|---|
| Max Flow | Up to 1000 LPM (60 M³/hr) |
| Max Pressure | Up to 120 PSI / 8.3 Bar |
| Max Solid Size | Up to 9.5 mm |
| Dry Suction Lift | Up to 8.3 m |
| Port Sizes | 1/2 inch to 3 inch |
| Air-to-Liquid Ratio | 1:1 |
| Air Inlet Size | 1/4 inch BSP to 1/2 inch BSP |
| Air Exhaust | 1/2 inch BSP to 3/4 inch BSP |
| Muffler | Integral - included on all sizes |
| Drive | Compressed air - no electric motor |
| Body MOC | PP / PVDF / Aluminium / SS304 / SS316 / SS304L / SS316L |
| Diaphragm / NRV Ball | Teflon (PTFE) / Santoprene / Neoprene |
| Connection | Threaded BSP / Flanged |
| Sound Level | 64.5 dB to 86 dB (water, ambient) |
| Testing | 100% tested before dispatch |
| Certification | ISO 9001:2015 |
ADD is air-operated. Final selection depends on compressed air supply, back pressure, MOC compatibility, suction condition, and fluid characteristics.
Applications
What the ADD Series Air Diaphragm Pump Transfers
Chemical and Acid Transfer
Sealless compressed-air transfer of corrosive chemicals, acids, alkalis, and aggressive process liquids where mechanical-seal leakage risk must be reduced.
Food, Beverage, and Pharmaceutical
Liquids, creams, compounds, drinks, and process fluids where stainless body and Santoprene or PTFE diaphragm selection are required.
Paint, Ink, Dyes, and Resins
Ink, dyes, thinners, paints, emulsions, pigments, resins, and adhesive-related fluid movement in printing and formulation plants.
Abrasive Slurry and Mining
Clay slip, titanium dioxide, slurry, grout, mill scale, cement, and mineral-duty transfer with solids handling capability up to 9.5 mm.
Oil, Grease, and Petroleum
Petrol, diesel, hydraulic oil, lube oil, cutting oil, and related industrial fluids where no motor at the pump is a practical advantage.
Sludge, Sewage, and Effluent
Municipal and industrial sludge, sewage, coal slurry, lime slurry, and effluent duty where solids would challenge conventional centrifugal pump designs.
When ADD May Not Be the Right Choice
ADD requires compressed air at the installation site. For very high head beyond 8.3 Bar, specify HPD. For large continuous high-flow utility transfer, use centrifugal series such as SCH, SCC, or CMB as appropriate. For very high viscosity beyond the practical air-diaphragm range, confirm whether PCS is the better fit.
Selection Guide
ADD vs Other Positive Displacement and Utility Pump Series
ADD vs Centrifugal
ADD is chosen when sealless air-driven transfer, run-dry safety, abrasive handling, solids passage, or no-electricity-at-pump installation is more important than centrifugal efficiency.
View CMB SeriesADD vs HPD
HPD is a motor-driven high-pressure dosing and plunger family for precise higher-pressure duty. ADD is air-operated and better suited to broad fluid compatibility with lower pressure and sealless operation.
View HPD SeriesADD vs PCS
PCS provides motor-driven progressive cavity transfer for very high viscosity and smoother flow. ADD is the air-operated option where compressed air is available and sealless operation is critical.
View PCS SeriesADD vs LBX
LBX is a motor-driven hygienic lobe pump. ADD remains the better fit where no electricity is desired at the pump or where portable sealless food-duty transfer is required.
View LBX SeriesQuote checklist
Get a Quote for the ADD Series
Share fluid, flow, pressure, body MOC, and diaphragm requirement. ADD is air-operated. Final selection depends on compressed air supply, back pressure, MOC compatibility, suction condition, and fluid characteristics.
Send ADD RequirementShare These Details
- Flow rate (LPM)
- Discharge pressure required (PSI / Bar)
- Fluid name and type
- Concentration / solids content / viscosity
- Suction condition (flooded / suction lift)
- Body MOC (PP / PVDF / Al / SS304 / SS316)
- Diaphragm MOC (Teflon / Santoprene / Neoprene)
- Connection (thread / flange)
- Air supply pressure available
- Hazardous area requirement
- Application and industry
Related Pump Series
Other Pump Series from Shubham Industries
High-Pressure Dosing Series
Motor-driven high-pressure plunger and dosing duty
View Series
Progressive Cavity Screw Series
Motor-driven positive displacement transfer for viscous duty
View Series
Lobe Series Xtreme
Food and pharmaceutical lobe-pump transfer
View SeriesCommon Questions
Frequently Asked Questions - ADD Series
An air operated double diaphragm pump is a positive displacement pump driven by compressed air. Two diaphragms move alternately to create suction and delivery strokes, while ball valves keep the liquid moving in one direction. The ADD Series covers up to 1000 LPM at up to 120 PSI / 8.3 Bar.
About the Manufacturer
Shubham Industries is an industrial pump manufacturer located in Kuha, Ahmedabad, Gujarat, India. Established in 1987, the ISO 9001:2015 certified company has delivered over 45,000 pumping units across the Indian subcontinent. Specializing in centrifugal pumps, chemical polypropylene pumps, and positive displacement lobe pumps, Shubham Industries engineers fluid handling solutions for chemical, pharmaceutical, water treatment, and food processing industries. Every pump is dispatched with a hydrostatic test certificate from the Ahmedabad facility.