DEPA · AIR OPERATED DIAPHRAGM PUMPS
DEPA Type DP Powder Air Operated Diaphragm Pumps – Dust-Free Powder Transfer AODP
DEPA Type DP powder AODPs for dust-free transfer of powders and bulk solids. Y-manifold design, aeration valve, aluminium and stainless steel. Available

Overview
The DEPA Type DP is a purpose-built Air Operated Diaphragm Pump for the economical, almost dust-free transfer of powders and bulk solid materials. Standard AODP designs are not suited for powder transfer because conventional ball check valves and manifold geometry restrict powder flow and cause bridging. The Type DP addresses this with wide-bore Y-shaped suction and discharge manifolds that allow powder to pass freely through large, unobstructed passages.
An aeration valve fitted to the suction inlet introduces a controlled air flow to fluidise the powder immediately before it enters the pump, enabling reliable and repeatable transfer of fine, light, or cohesive powder materials. The result is continuous, almost dust-free powder conveyance with no manual handling, reducing operator exposure to airborne particulates.
The DP 80 (3") is the largest powder AODP offered by DEPA. The DP 125 (5") model in the wider DEPA range is the world's largest Air Operated Diaphragm Pump.
Key Features
- Y-shaped suction and discharge manifolds for unobstructed powder flow
- Aeration valve on suction inlet fluidises powder before entry
- Almost dust-free transfer — minimises airborne particulate contamination
- Large bore passages reduce bridging and blockage risk
- Available in aluminium, cast iron, and stainless steel
- No mechanical seals or rotating parts in the flow path
- Tolerant of dry running
- ATEX compliant versions available for explosive dust atmospheres
- Infinite flow regulation via air pressure adjustment
- Operates on standard 7 bar compressed air — no electricity at the pump
Specifications
| Parameter | Value | |
|---|---|---|
| Available Sizes | DP 50 (2"), DP 80 (3") | |
| Housing Materials | Aluminium (FA), Cast Iron (CA), Stainless Steel (SL) | |
| Max Operating Pressure | 7 bar | |
| Manifold Design | Wide-bore Y-shaped suction and discharge | |
| Suction Inlet | Fitted with aeration valve as standard | |
| Compliance | ATEX (dust and gas), CE | |
| Housing | DP 50 (2") | DP 80 (3") |
| FA — Aluminium | ● | ● |
| CA — Cast iron | ● | ● |
| SL — Stainless steel | — | ● |
Applications
The DEPA Type DP is specified wherever reliable, low-dust powder transfer is required in process industries:
- Plastic Manufacturing: Transfer of pellets, granules, and powder from bulk bags or silos to processing equipment - Basic Chemistry: Powdered catalysts, salt, soda ash, and other bulk chemical powders - Pharmaceutical Industry: Active pharmaceutical ingredient (API) powders and excipient transfer requiring dust control and containment - Breweries: Yeast, malt flour, and grain powder transfer in brewing and fermentation processes - Food Industry: Flour, sugar, starch, milk powder, and spice transfer with hygienic and dust containment requirements
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