Diaphragm Pumps Ltd

Depa_L Air Operated Double Diaphragm (AODD) Pumps are becoming the most common pumps for use when Only Air is available or when pumping solid laden liquids or slurries. Depa_L Diaphragm Pumps have no seals as the diaphragm acts as the barrier between the Liquid side and the drive side of the pump. When the liquid pressure reaches the air pressure, the Depa_L pump reaches a point of balance and stalls without the need for bypasses or overload protection.Depa_L Diaphragm Pumps pump can run dry indefinately and have the ability to self prime to 7 metres or more in some cases. They can handle viscosities up to 20000 Centipoise as standard and some Depa_L models can handle cPs into the 100's of 1000's. Depa_L Pumps are some of the most reliable AOD's in the marketplace, Self Priming, Dry running, Intrinsically safe, these are just a few of the features of Depa_L Diaphragm Pumps. Models include pumps for pumping hygienic products, aggressive chemicals aswell as standard industrial duties. High pressure models are also available for filter press applications or for pumping into closed systems. ATEX regulated Depa_L pumps are offered for Zone 1 environments. Depa_L Pumps and spares are available from Diaphragm Pumps Ltd, Stoke On Trent, England. As one of the largest stockists of pumps and spares in Europe, we hope we can supply all your Depa_L Pump needs.

DEPA L Type- Polished Stainless Steel Pumps

DEPA Polished Stainless Pumps

The DEPA L Type series are made extra bright polished stainless steel developed for applications in the food, pharmaceutical, cosmetic and beverage industries. In these industries stainless steel pumps have been an indispensable standard for many years, used for process and transfer duties.

The high demands placed on pumps with respect to housing materials (stainless steel 304 or 316 L), surface quality (up to 0.5 µm available) and approved elastomer materials (FDA) can be met with this versatile range.

This range can be supplied with the option of internal or external lubricant free air control valves. Contamination of the pumped medium and the surrounding environment is therefore eliminated. Cleaning methods and ability to sterilise i.e. CIP (Clean in Place) and SIP (Sterilise in Place), which have varying standards throughout the world, were also focal points during the design of these pumps. Polished stainless steel pumps are therefore available as SL (304) or UE (316 L) versions with extra bright tightening clamp bands and as DH-UE version in a flanged construction design.

Pumps can be specified with optional fluid connections, such as dairy tube fitting. Aseptic DIN 11864, Triclamp or Neumo, as required for the application.

Due to large ball valve clearances these pumps can handle media containing solids, such as pieces of fruit, meat or vegetable. Solid Size is dependant on the pump size. These sensitive products are transferred through the pump without damage.

All polished stainless steel pumps are delivered with an extra bright polished frame, which, on some models, is adjustable in height.

  • Key features: A range of air operated diaphragm pumps proven in the market place for its mobility and ease of maintenance.
  • Size Range: DN 15 – DN 80
  • Pressure Rating: Std 7 Bar (additional on request)
  • Approvals: BS EN ISO 9001, EHEDG, 3A, USDA, FDA approved materials available.
  • Key Applications: Food and beverage, Healthcare, Dairy, Pharmaceutical and Biopharm and Fine powders.
Powder Pumping: The pumping of fine powders with air operated diaphragm pumps is a specialized application in which we have a considerable experience with our DEPA range.


DEPA Brochure pdf