Air Operated Diaphragm Pumps
Tapflo Air Operated Diaphragm Pumps are some of the most versatile pumps on the market today. They can be used in a variety of installations in numerous applications. Thanks to the simple operating principle, compact and reliable design and wide variety of materials (PE, PTFE, Aluminium, Cast Iron & Stainless Steel AISI 316L), Tapflo Air Operated Diaphragm Pumps meet the demands of heavy industrial, hygienic and pharmaceutical applications. Their innovative design features up to 70% less parts than their competition meaning down time and costs of spares can be kept to a minimum and simple maintenance procedures are guaranteed!
Their modular design also allows them to be modified for a variety of applications whist not having to replace the pump. Simply purchase the required additional spares to upgrade your standard Tapflo Air Operated Diaphragm Pump into a LEAP, TT Twin, TB Barrier or TD Drum Pump today! 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!
Air Operated Diaphragm Pumps are mostly made up of 2 Liquid Chambers, 2 Air Chambers and 2 Diaphragms, with a Flexible Diaphragm separating both the Liquid and Air Chambers.
Compressed Air is supplied to the air valve which distributes the air from the Centre Block, where 2 ports direct the flow of air to the right and left Air Chambers.
The same air pressure from the air supply is directly applied to the back side of one of the Diaphragms, forcing it forward and therefore the medium out of the Fluid Chamber, lifting the Ball Check Valve and out of the Discharge Port (2), with equal pressure to that which is supplied.
The Diaphragms are connected by a shaft which is screwed into the centre of each. As one of them is forced forward the other is pulled towards the Centre Block, causing a vacuum effect on the suction side. The medium is subsequently drawn through the Suction Port (1) and into Fluid Chamber.
The Air Valve automatically transfers the air pressure to the opposing side at the end of each stroke, reversing the action. Hence the term 1:1 reciprocating pump.
The Ball Check Valves alternately Open & Close in unison with the reciprocating action of the diaphragms. Enabling filling of the Fluid Chambers and preventing back flow through the pump. A variety of Balls can be supplied to provide both chemical resistance and different weights to suit the viscosity of the medium.
Changes in Capacity due to Suction Lift & Viscosity
Air Operated Diaphragm Pumps capacity will vary according to changes in both viscosity and suction lift, below are charts displaying the % drops in flow according to the changes in both. These variations need to be taken into account when selecting a suitable pump.
General Benefits to Air Operated Diaphragm Pumps
- Run Dry without damage – No need for dry run protection devices
- Infinitely variable flow control – achievable by adjusting the air flow to the pump via a blocking needle valve
- Air Operated – Intrinsically safe and simple to install, no special training required.
- Self-priming up to 9 m, when wetted
- Solids Handling & resistant to abrasion
- Can handle both thin and viscous fluids
- Can operate against a closed valve without damage – the pump will simply stall
- Available in a wide variety of materials to suit almost any fluid
- Sealless – no mechanical seal, which is the weakest point on any type of pump
- Decent volumetric efficiency – enables them to be used in batching and metering applications
- Relatively low initial cost
- Simple maintenance and low cost of ownership
- Wide range of installation possibilities
- Discharge Pressures up to 8 bar as standard, 16 bar when being used with a booster
Air Operated Diaphragm Pump Key Components & Benefits
There are 3 essential components for the functioning of any diaphragm pump. Tapflo have specifically engineered these to be of the highest quality and reliability.
Long Life Diaphragms
With our extensive experience of diaphragm manufacturing we are able to supply unique, compression moulded, diaphragms of the upmost quality. The benefits of this type of design are superior life for continuous & heavy duty operation and a completely smooth surface in contact with the liquid. This results in no leak through and a diaphragm which is easy to keep clean.
The diaphragms are available in various materials and colours to suit any requirements:
- PTFE TFM
- PTFE TFM, modified for solvents
Energy Saving Drive
The air valve is the heart of any Air Operated Diaphragm Pump. It distributes the compressed air to the air chambers behind the diaphragms.
The air valve in a Tapflo Air Operated Diaphragm Pump is placed in the middle of the pump, between the diaphragms, to achieve the shortest air paths possible and a minimum of so-called “dead volumes”. This all together is the key to a reliable and energy-saving drive.
The Tapflo air valve has no deadlock position – the pump will always start automatically when the air is supplied to the pump.
The valve body is made from brass or optional PET or stainless steel AISI 316.
It is made for maintenance free duty with non-lubricated air, thanks to the ingenious sealing system. It will not only save you money on lubrication, it will also protect the environment from pollution.
Ball Check / Flap Valves
The Tapflo Air Operated Diaphragm Pump pump is fitted with four check valves as standard, making sure that the liquid is transferred in the right direction through the pump and that the pump remains primed.
The ball type valve is the most simple and reliable valve design. It has a good sealing capability and is easy to keep clean and to replace if necessary.
The ball valve materials are available in EPDM, NBR (nitrile), PTFE, AISI 316, polyurethane and ceramic to suit any kind of liquid.
With the avocation of Tapflo’s ingenious Magnetic Ball Lifters on our Sanitary and Aseptic EHEDG Pumps, users are able to drain the contents of the pump for CIP & SIP procedures without the need for disassembly or rotating the pump in its stand. What could be easier!
The Valve Ball is made from either Stainless Steel AISI 420 or PTFE with a Steel Core to ensure that they can be lifted by the Ball Lifters and are suitable with a wide array of fluids.
Flap valves are used on our Sanitary & EHEDG Air Operated Diaphragm Pumps when pumping liquids containing big solids without damage is required. We are able to pump solids up to 50 mm in both the T225 and T425 pump sizes and an impressive 100 mm in the T825 4” pump. When fitted with flap valves, our pumps can reach dry suction lift of 4.5 meters. Tapflo flap valves are durable, have only two spare parts and are hygienic thus easier to clean.
PE/PTFE Air Operated Double Diaphragm Pumps (9)[tm_tabs style="5"] [tm_tab title="PRODUCTS"] [/tm_tab] [tm_tab title="INTRODUCTION"]
PE/PTFE Air Operated Double Diaphragm PumpsTapflo manufacture and supply their Air Operated Diaphragm Pumps in both solid block polyethylene (PE) and virgin PTFE plastics. These materials can be used to handle almost any liquid substance, including those which are viscous, contain solids or even the most chemically aggressive such as concentrated nitric acid. Thanks to their modular design, these units can also be easily converted into the many different variants we have on offer to ensure that you are being supplied with the most suitable and reliable pump for your requirements. [/tm_tab] [tm_tab title="FEATURES"]
Features and Benefits of PE/PTFE Air Operated Double Diaphragm PumpsThe pump has been innovatively designed with up to 70% fewer parts than other Air Operated Diaphragm Pumps on the market. Fewer components mean a pump which is compact as well as easy & quick to maintain. The result is lower service costs and process downtime. [/tm_tab] [tm_tab title="MATERIAL"]
PE PumpsTapflo have standardised to Solid Block Polyethylene (PE HD) instead of moulded PP (Polypropylene), which is commonly used amongst other Air Operated Diaphragm Pump manufacturers on the market. There are couple of reasons for this: PE has a superior wear resistance (6 to 7 times better) to PP. This fact makes the pump perfectly suitable for handling abrasive slurries and preferred to Stainless Steel in these applications. Tapflo also uses different grades of PE depending on the part to ensure the best mechanical and abrasion resistance. For instance, valve seats and ball stoppers, which are the most vulnerable parts to wear, Tapflo use UHMW PE1000 which has even greater resistance to abrasion and mechanical stress. PE is also resistant to most kinds of aggressive chemicals such as concentrated acids and alkalis. Making it an ideal material for chemical handling as well. PP is instead used as material for the centre blocks, again machined from solid block instead of moulded.
PTFE PumpsTapflo offers virgin solid block PTFE as an alternative to PE as it offers superior chemical and temperature resistance. PTFE will handle even the most aggressive of acids, such as concentrated Nitric Acid and handles temperatures up to 100ºC instead of 70ºC for PE. [/tm_tab] [tm_tab title="APPLICATIONS"]
Typical ApplicationsThe Tapflo PE/PTFE Air Operated Double Diaphragm Pumps are ideally suited to a plethora of applications in numerous industries, such as:
Industry Application Chemical Acids, alkalis, alcohol, solvents, latex & emulsions Food CIP fluid, flavouring & pigments Pulp & Paper Glue, slurries, adhesives, dispersions, resins, sodium silicate & titanium oxide Surface Conditioning Electroplating baths, various acids, solvents, anodic sludge, varnish & enamels Water Treatment Sludge handling, filter press applications, neutralization & flocculants Electronics Carrier fluids, ultra-pure liquids, electroplating solutions, mercury & solvents
Metal Air Operated Double Diaphragm Pumps (10)[tm_tabs style="5"] [tm_tab title="PRODUCTS"] All of our Metal Air Operated Double Diaphragm Pumps are available in ATEX rated versions and are supplied with an earthing connection and conductive centre sections and Diaphragms (PTFE or EPDM). [/tm_tab] [tm_tab title="INTRODUCTION"]
Metal Air Operated Double Diaphragm PumpsThe Tapflo Air Operated Diaphragm Metal Pump Series cast from Aluminium, Cast Iron, Stainless Steel AISI 316 & PTFE Coated Aluminium and are suitable for handling any kind of liquid whether it is viscous, chemically aggressive or containing abrasive solids. They are characterised by their simple, compact and robust design with high functionality. As with all Tapflo pumps, their modular design enables them to also be modified into many different versions such as the TT Twin, TB Barrier or the TD Drum Pump. [/tm_tab] [tm_tab title="FEATURES"]
Tapflo Design Features & BenefitsThe Metal Air Operated Double Diaphragm Pumps have been innovatively designed with up to 70% fewer parts than other Air Operated Diaphragm Pumps on the market. Fewer components means a pump which is compact as well as easy & quick to maintain. The result is lower service costs and process downtime.
Aluminium & Cast Iron PumpsMetal Air Operated Double Diaphragm Pumps are ideally suited for the transfer of pH-neutral fluids, both thin, thick, solid laden or abrasive. The aluminum and cast iron pumps are found in most fields; workshop and paint industries, purifying plants etc., to mention only a few. They are also widely used for the transfer and batching of hydrocarbons such as diesel and varying oils such as lube oils, hydraulic oils & gear oils.
Stainless Steel AISI 316 PumpsCast via the “lost wax” method, ensuring greater accuracy and finish quality, the stainless steel pumps combine great mechanical strength with good chemical resistance. Stainless Steel AISI 316 is resistant to aggressive liquids like nitric acid and sodium hydroxide. The centre unit, which is not in contact with liquid, is made from corrosive resistant polypropylene (PP) as standard (other materials are available upon request such as carbon impregnated PP, Aluminium & Stainless Steel AISI 316). [/tm_tab] [tm_tab title="APPLICATIONS"]
Typical ApplicationsThe Tapflo Air Operated Diaphragm Pumps are ideally suited to a plethora of applications in numerous industries, such as:
Workshops Oil, fat, solvents, water, cooling fluid, lubricants Print & Paint Glue, additives, varnish, ink, paint, latex, acid, resins, pigments Mining & Construction Adhesives, sump, dewatering, coal sludge, pastes Ceramics Industry Abrasives, glaze, water, enamels, clay Chemical Acids, alkalis, alcohol, solvents, latex, emulsions
Hygienic Air Operated Double Diaphragm Pumps (4)[tm_tabs style="5"] [tm_tab title="PRODUCTS"] All of our Hygienic pumps are available in ATEX rated versions and are supplied with an earthing connection and conductive centre sections and Diaphragms (PTFE or EPDM). The EHEDG certificate is your guarantee that the design is according to the hygienic guidelines. [/tm_tab] [tm_tab title="INTRODUCTION"]
The Hygienic Air Operated Double Diaphragm PumpsThe Hygienic series of Air Operated Diaphragm Pumps consists of 3 main product groups, Sanitary, Aseptic EHEDG and Pharmaceutical. They are designed specifically for use within the food & beverage, pharmaceutical & cosmetics industries where sanitary equipment is required in order to prevent contamination of the products being pumped. They are ATEX, FDA, EHEDG, USP VI & FDA approved to ensure the highest levels of quality & reliability. Additional components such as Flap & Ball Cup Valves, Heating Jackets and Magnetic Ball Lifters mean these highly innovative products can also be customised to even the most arduous applications. [/tm_tab] [tm_tab title="FEATURES"] Hygienic Air Operated Double Diaphragm Pumps has been innovatively designed with up to 70% fewer parts than other Air Operated Diaphragm Pumps on the market. Fewer components means a pump which is compact as well as easy & quick to maintain. The result is lower service costs and process downtime. The Sanitary series has taken this innovative design philosophy and extended it to be cleanable with the following design features. The Tapflo Aseptic EHEDG Air Operated Diaphragm Pumps offer an improved version of the innovative design of the standard Sanitary by smoothening out the internal crevices and parts in contact with the fluid to ensure that there is absolutely no areas where bacteria and contamination can build up. After the CIP procedure, the pump usually has to be drained from the CIP fluid. The Tapflo sanitary series is supplied with a hygienic stand, enabling 360° rotation of the pump unit in 3 simple steps! Disconnect the pump from the pipework Loosen the two socket head cap screws on the stand & rotate the pump 180° to let the remaining fluid drain off. The airline may be left connected during this operation. Rotate the pump back into position and refit the socket head cap screws and reconnect the pipework. The Tapflo TU Pharmaceutical Air Operated Diaphragm Pumps have taken the innovative design of the standard PE & PTFE series and improved on it by integrating electro-polished SS316L inlet and outlet manifolds with sanitary clamp connections and smoothened out the internal surfaces to ensure no bacterial growth or contamination of the pumped fluid. [/tm_tab] [tm_tab title="DOWNLOADABLES"] Download the Hygienic Series Brochure Download the Hygienic Series Manual Download the TC Series Brochure Download the TC Series Manual [/tm_tab] [/tm_tabs]
Diaphragm & Electric Pump Accessories (12)A Great Range of Tapflo Diaphragm & Electric Pump Accessories Tapflo UK Ltd. is not just a simple pump distributor. We deliver a large range of Diaphragm & Electric Pump Accessories. Our system design and innovation team have developed numerous controls and accessories for the Tapflo range of products over the years. These systems enable us to offer advanced protection, control, and automation of the Tapflo range of Air Operated Diaphragm Pumps and Roto-dynamic Pumps. Diaphragm Pumps have a broad range of available accessories, Tapflo Design and manufacture a full range of control and monitoring systems to ensure efficient and simple control throughout your process. Tapflo Guardian – Fully pneumatic monitoring system used to monitor the pumps performance for safety and energy saving. Tapflo Batcher – Fully Pneumatic Batching counter used to accurately batch a set amount of media and then shut the pump down. Tapflo Level System – Fully Pneumatic Automatic Level system used to maintain set levels within a volume of media. Tapflo Life Counter - Pump life counter that works off the exhaust of the pump. Tapflo UK also has the ability in-house to design and manufacture specialist control systems for Diaphragm pumps.
DT Series Active Pulsation Dampeners (3)[tm_tabs style="5"] [tm_tab title="PRODUCTS"] [/tm_tab] [tm_tab title="INTRODUCTION"]
DT Series Active Pulsation DampenersThe Tapflo DT Series Active Pulsation Dampeners are the most efficient way to remove pressure variations on the discharge of the pump. The Tapflo pulsation dampener works in tune with the diaphragm pump it is fitted to, automatically setting the correct pressure to minimize the pulsations. The DT Pulsation Dampeners are available for all Tapflo pump sizes and material versions. [/tm_tab] [tm_tab title="OPERATING PRINCIPLE"]
DT Series Active Pulsation Dampeners Operating PrincipleThe air pressure supplied to the dampener is the same as the one supplied to the pump. When the pressure in the piping system decreases, due to the pulsating nature of the pump operation, the pulsation dampener supplies extra pressure to the discharge between the pump strokes, therefore supplying a steady flow of pumped medium. This pumping action created by the dampener, decreases the pressure variations and pulsations. [/tm_tab] [tm_tab title="FEATURES"]
Features & Benefits of DT Series Active Pulsation Dampeners
- Minimise vibrations and water hammer effects
- Protect all kinds of instruments in your pipework
- Optimise pump performance and reduce maintenance costs
- Requires no pre-charging
- Modulates itself to the system requirements and pump performance unlike standard dampeners.
- More compact and modular unit which can be easily integrated into pipework systems or supplied built onto pumps to reduce the footprint even further.
- Can be supplied with numerous options such as:
- BSP / NPT / Sanitary / Flanged Connections
- Baseplates or Anti-Vibration Feet
- Back-Up Diaphragm & fitted Guardian System
- Housing Reinforcement Plates
- Fitted to pump on a trolley
Dimensional Drawings1 PE / PTFE 2 ALU / SS 3 ISO 2852, DIN 11851, SMS 1145, BS 4825 (RJT) * Dimensions in mm (where not otherwise stated. Dimensions for other connections in IOM Manual p. 17 4 DIN 2642, PN 10, Loose 5 DIN PN10/16, According to UNI 2277 / 2278 6 ANSI 150, According to ASTM A 182 SO / RF 150 lbs 7 ANSI B16.5, Loose, 150 lbs [/tm_tab] [tm_tab title="EXTRA"]
Spare Parts, PE, PTFE & Aluminium Dampeners
Pos. Qty Description Material 11 1 Dampener Housing PE, PTFE, Aluminium 113 4 (PE & PTFE) Threaded Insert PET 1173 1*** Reinforcement Plate AISI 316L 1181 1*** Cover PE 12 1 Dampener Block PP 14 4/6/8* Pin Screw A4-80 15 1 Diaphragm EPDM, PTFE, NBR, FKM*** 1651 1 Shaft AISI 316L 1552 1 Shaft Ending A4-80 17 (Optional) 1 Base AISI 316L 174 (Optional) 4 Socket Head Cap Screw A4-70 175 (Optional) 4 Washer A4-70 179 (Optional) 4 Rubber Foot NBR 25 1 Muffler PPM-F 27 1 Circlip Cr3 Coated Steel 36 3 Seal (O-Ring) PE 37 8/12/16* Nut A4-70 38 8/12/16* (PE,AL); 8/12/16* (PTFE) Washer A4-70 47 3/6** O-Ring (Back up for 36) NBR (Std.), EPDM, FKM 579 8/12/16* (PE,AL); 8/12/16* (PTFE) Nut Cover PE 70 2 Flange Pipe (Threaded) PE, PTFE 71/73 2 Loose Flange Ring PP 90 1 Grounding Set AISI 316L
Spare Parts, Stainless Steel & Sanitary
Pos. Qty Description Material 11 1 Dampener Housing Stainless Steel AISI 316L 12 1 Dampener Block PP 14 4/6/8* Pin Screw A4-80 15 1 Diaphragm EPDM, PTFE, NBR, FKM** 1651 1 Shaft AISI 316L 1552 1 Shaft Ending A4-80 17 (Optional) 1 Base AISI 316L 174 (Optional) 4 Socket Head Cap Screw A4-70 175 (Optional) 4 Washer A4-70 25 1 Muffler PPM-F 27 1 Circlip Cr3 Coated Steel 36 3 Seal (O-Ring) PE 37 8/12/16* Nut A4-70 38 4/6/8* Washer A4-70 47 3 O-Ring (Back up for 36) NBR (Std.), EPDM, FKM 579 4/6/8* Nut Cover PE 90 1 Grounding Set AISI 316L
Recommended SparesEven during normal operation, some internal parts of the dampener are going to be subject to wear and tear. In order to avoid expensive and unnecessary breakdowns we recommend stocking the following spares:
Pos. Description Quantity 15 Diaphragm 1 25 Muffler 1