Sanitary Air Operated Double Diaphragm Pumps

Aseptic EHEDG Air Operated Double Diaphragm Pumps

Sanitary Air Operated Double Diaphragm Pumps



Sanitary Air Oped Double Diaphragm Pumps Series

The Tapflo Sanitary Air Operated Double Diaphragm Pumps Series have been specially designed to meet the requirements of the food, beverage, pharmaceutical and cosmetic industries. Lubrication free air distribution system, maintenance free ball check valve system and total visual inspection of the wetted parts are some of the major features for this pump series. There are no hidden areas where bacteria can grow. The manifold clamps and the housing screws are simply removed for complete disassembly and cleaning. The pump is also designed for cleaning and sterilization in place – C.I.P. and S.I.P. After such operations, the pump is easily turned in its support for drainage.

Models are supplied with an extra fine surface finish to Ra 0.8 as standard and to Ra 0.5 upon request.

The Sanitary Air Operated Double Diaphragm Pumps are supplied as standard with ISO Tri-Clamp connections. However, they may also be equipped with almost any type of connection used in the hygienic field – DIN clamps, SMS milk, RJT, DIN aseptic to mention a few.

Thanks to Tapflo’s innovative, simple & ingenious design these pumps are compact, robust & reliable. Furthermore, they are quick & easy to maintain, keeping your service costs and process down time to an absolute minimum.

When used in conjunction with Tapflo’s patented control and monitoring equipment, preventive and routine maintenance is also easily integrated into any process, whilst also enabling accurate and precise control of the pump’s performance. Optimising your system to the best of its ability!

Typical Applications

The Tapflo Sanitary Air Operated Diaphragm Pumps are ideally suited to a plethora of applications in numerous industries, such as:


Industry Example of application
Dairy products Milk, cream, yogurt, cream cheese, melted cheese
Grocery Ketchup, mayonnaise, tomato products, mustard
Beverages Flavours, colouring, fruit juice
Bakery Dough, ingredients
Brewery Beer, flavours, colouring, wort
Hygiene Soap, toothpaste, shampoo
Cosmetics Cream, alcohol, perfume

Materials Data
Component Material
Wetted Metal Parts Stainless Steel AISI 316L electro polished (T825 glass blasted)
Centre Block PP & Conductive PP
Diaphragms PTFE, PTFE 1705B, PTFE with white back, EPDM, white EPDM, NBR
Valve Balls PTFE, EPDM, NBR, AISI 316, PU, Ceramic
Air Valve Brass (std.), stainless steel AISI 316L or PET  with NBR (std.), EPDM or FKM O-rings
Sealing (Wetted) PTFE or EPDM
Housing Pin Screws Stainless Steel AISI 316
Diaphragm Shaft Stainless Steel AISI 316L (T30 & T825), 304L (T80 – T425)


Performance Range

The Tapflo Sanitary Air Operated Double Diaphragm Pumps have a wide range of capacities to suit almost any application, from metering and dosing to general transfer. The max capacity range varies from 30 – 825 l/min with discharges pressures up to 8 bar as standard & standard solids passage up to 15 mm or 100 mm with Flap Valves.


Data Pump Size
T30 T80 T125 T225 T425 T825
Max Capacity, l/min 30 80 125 225 425 825
Volume / Stroke, ml (*) 120 320 515 1415 2600 4500
Max Discharge Pressure, Bar 8 8 8 8 8 8
Max Air Pressure, Bar 8 8 8 8 8 8
Max Dry Suction Lift, m (**) 2 3 4 5 5 4
Max Wet Suction Lift, m 8 8 9 9 9 9
Max Permissible ø of Solids, mm (Ball Valves / Flap Valves) 3 4 6 10 / 51 15 / 51 20 / 100
Max Fluid Temp w/ EPDM / NBR Diaphragm, ºC 80
Max Fluid Temp w/ PTFE Diaphragm, ºC 110
Min Fluid Temp, ºC -20
Weight, Kg 4 8 11 21 35 133

* = The value is based on pumps with EPDM diaphragms. Pumps with PTFE diaphragms produce approx. 15% less volume

** = This is max value with stainless steel valve balls, other valve ball materials may reduce the suction.

Performance Curves

Performance Curves Sanitary

General Dimensional Information


T30 Sanitary

 T80 – T825

T80 – T825 Sanitary


Dimensions Table 

NOTE: Build specific GA Drawings in 2D as well as DWG and STEP Files are available on request for easy integration into system installations and OEM products. Dimensions are in mm and based on standard build constructions.

Dim Pump Size
T30 T80 T125 T225 T425 T825
A 168 303 328 412 476 760
B 153 295 320 404 468 750
D 313 393 458 646 / 792** 808 / 950** 1306 / 1495**
E 240 294 350 528 / 690** 664 / 775** 1034.5 / 1270**
G 33 36 44 50 80 136 / 150**
H 30 30 30 30 30 60
I 48 74.5 83 86 / 70** 98 / 140** 206.5 / 165**























3” / 4”**




K 9 9 9 9 9 25
M* 50.5 50.5 50.5 64 91 91 / 119**
N* 22.6 22.6 35.6 49 66 72.9 / 100**
X 125 275 300 384 448 710

* = Dimensions according to standard Clamp Connections only

** = Dimensions with Flap Valves and Heavy Duty Valve Cups

1 = Clamp connections according to SMS3017 (T30 – T225) / ISO2037 (T425-T825)

2 = Threaded connections according to DIN 11851

3 = Threaded connections according to SMS 1145

Sanitary Air Operated Double Diaphragm Pumps with flap valves option

Sanitary Series of Air Operated Double Diaphragm Pumps with Flap Valves option

Available on 3 pump sizes: T225, T425 & T825

Provide solids passage from 50 – 100 mm, model dependent.

Provide Dry Suction Lifts up to 4.5 m

Flap valves are a great option when the product to be pumped has a high viscosity, contains big solids or solids that can be damaged by standard valve balls (e.g. fruits).

Mounted with clamps they provide easy maintenance and cleaning.

Made in AISI 316, they are mounted in a special flap valve cup with clamps between housing and manifold.

Pumps with flap valves differ from standard pump by valve type, manifolds and pump housing.

NOTE: Flap valves are not appropriate for pumping water-like products. If a liquid has low viscosity, the valve will open and close very fast with no shock absorption that is provided by viscous products. Also, dry running of the pump for longer periods will cause rapid valve wear and eventually pump stopping.

Modify your existing pump to be fitted with flap valves with following additional parts!

  • T225 = Flap Valve Compete x 4 (P/N: 6-225-24H)
  • T425 = Flap Valve Compete x 4 (P/N: 6-425-24H)
  • T825 = Flap Valve Compete x 4 (P/N: 6-825-24H)

Sanitary Air Operated Double Diaphragm Pumps with ball cup option

Sanitary Series of Air Operated Double Diaphragm Pumps with Ball Cup Valves option

This option is a perfect solution when there is risk of damage to the valve seats from the product. If such situation is to occur there is no need to replace the whole manifolds or housings, just the valve cup what drastically reduces the spare parts cost.

Just like the flap valve it is made of AISI 316 stainless steel and is mounted between the

housing and manifold with clamps. In the same way the manifolds, pump housing and pump stand have to be changed in comparison to a standard sanitary pump.

The following additional parts are required to optimise your pump to be fitted with ball cup valves.

  • 4 x Ball Valve Cups
  • 2 x Manifold for Ball Cup Valves
  • 2 x Pump Housing – Ball Cup Valves
  • 8 x 3-Clamp Seal
  • 4 x 3-Clamps
  • 4 x Valve Ball Stops
  • 4 x O-Rings
  • 1 x Pump Stand


Sanitary Air Operated Double Diaphragm Pumps with heating jacket option










Sanitary Series of Air Operated Double Diaphragm Pumps with Heating Jacket option

The heating jacket is a great option when the pumped product tends to solidify at lower temperatures e.g.

Chocolate or paraffin.

When the pump has finished its duty and is left for some time without operation the product can solidify inside.  This is when the heating jacket comes in. Before next pump start-up, heating medium like water or steam is into the heating system for a defined period of time to melt the product inside the pump. Only then can the pump be started again with no risk of damage.


When using steam as the heating agent the flow must be from top to bottom (due to steam condensation). In case of hot water or other liquid it is the other way around.

Do NOT exceed 2 Bar pressure in the jacket.


Sanitary Air Operated Double Diaphragm Pumps

Sanitary Series of Air Operated Double Diaphragm Pumps with Magnetic Ball Lifters option

Magnetic ball lifters are implemented in Sanitary and Aseptic EHEDG series of AODD pumps, to enable pump emptying without removing it from the installation when no other draining option is available. Rotating the pump is also no longer needed.

The balls are lifted by simply attaching the magnets to the pumps manifold.

Valve balls are available in AISI 420 magnetic stainless steel or PTFE with steel cores.

Pump Emptying Procedure:

  1. Install the magnets onto the pump manifolds in the valve seat area
  2. Run the pump slowly
  3. After a few cycles, the pump will start to dry run
  4. Turn off the pump
  5. Take off the magnets & manifold

Modify your existing pump to be suitable for use with Magnetic Ball Lifters with the following additional parts!

  • 4 x Valve Balls (PTFE Steel Core or AISI 420)
  • 4 x Magnetic Ball Lifter
  • 1 x Magnet Holder

Permitted Loads on Manifolds
Permitted Loads on Manifolds Sanitary
T30 T825
Direction Load (N) Moment of Force (Nm) Direction Load (N) Moment of Force (Nm)
X 16.2 3.4 X 93 13.2
Y 16.2 3.4 Y 93 13.2
Z 16.2 3.4 Z 93 13.2
Direction Load (N) Moment of Force (Nm)
X 31 6.3
Y 31 6.3
Z 31 6.3
Direction Load (N) Moment of Force (Nm)
X 35 7.3
Y 35 7.3
Z 35 7.3
Direction Load (N) Moment of Force (Nm)
X 43 8.8
Y 43 8.8
Z 43 8.8
Direction Load (N) Moment of Force (Nm)
X 56 11.5
Y 56 11.5
Z 56 11.5

Additional information

Pump Size

T30, T80, T125, T225, T425, T825

Connection Size

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Drive Type

Flow Rate

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Self Priming

Solids Handling

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