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DW Series – Piston & Bi-Lobe Rotor Pumps
The DW Positive Displacement Pump Series delivers high volumetric efficiency with minimized internal clearances for cost savings. It ensures ultra-hygienic operation, handles harsh CIP/SIP cycles and provides pulse-free performance for consistent flow. With gentle product handling, low NPSH requirements, easy maintenance and low noise levels.
The APV DW Pump Series will be superseded by the next-generation APV DW+ pump, effective April 1, 2025. This change applies to all DW1-5 models, while the DW6 model will remain unchanged. For more information about our next-generation pumps, visit DW+ Series – Piston & Bi-Lobe Rotor Pumps
Food & Beverages
- Fruit Preserves
- Soups and Sauces
- Baby Food
- Chocolate
- Fruit Juice
- Cider and Wine
- Yeast
- Liquid Sugar and Glucose
Dairy
- Cream
- Butter
- Cheese Curd & Whey
- Yogurt
- Ice cream
Pharmaceutical and Toiletries
- Antibiotics
- Toothpaste
- Cough Medicine
- Shampoo
Chemicals
- Paint
- Oil Additives
- Resins
- Photographic Film Coatings
Product Specifications
The DW pump is designed for ultra-hygienic applications. The range consists of 26 models with capacities ranging from 0.8 gal/100 revs to 268 gal/100 revs (3 liters/100 revs to 1,016 liters /100 revs) and pressures up to 435 psi (30 bar). All product-contact parts are made from AISI 316L stainless steel and all elastomers comply with FDA-requirements.
There are two rotor types (piston and bi-lobe) available. The piston rotors can be easily changed to bi-lobe rotors without changing the rotor case. The porting on the pump can also be changed from horizontal to vertical (and vice versa) without any modification to the pump or use of a special gear case assembly.
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MODEL |
ROTOR TYPE |
MAXIMUM DISPLACEMENT |
MAXIMUM PRESSURE |
|---|---|---|---|
| DW1/003/7.5 | Piston | 0.8 (3) | 109 (7.5) |
| DW1/004/15 | Bi-lobe | 1.1 (4) | 218 (15) |
| DW1/007/7 | Bi-lobe | 1.8 (7) | 102 (7) |
| DW2/006/10 | Piston | 1.6 (6) | 145 (10) |
| DW2/007/20 | Bi-lobe | 1.8 (7) | 200 (20) |
| DW2/013/10 | Bi-lobe | 3.4 (13) | 145 (10) |
| DW3/014/10 | Piston | 3.7 (14) | 145 (10) |
| DW3/017/20 | Bi-lobe | 4.5 (17) | 290 (20) |
| DW3/030/10 | Bi-lobe | 7.9 (30) | 145 (10) |
| DW3/050/5 | Bi-lobe | 13.2 (50) | 73 (5) |
| DW4/033/10 | Piston | 8.7 (33) | 145 (10) |
| DW4/039/20 | Bi-lobe | 10.3 (39) | 290 (20) |
| DW4/073/10 | Bi-lobe | 19.3 (73) | 145 (10) |
| DW4/125/5 | Bi-lobe | 33.0 (125) | 73 (5) |
| DW5/080/12.5 | Piston | 21.1 (80) | 181 (12.5) |
| DW5/093/25 | Bi-lobe | 24.6 (93) | 363 (25) |
| DW5/142/15 | Bi-lobe | 37.5 (142) | 218 (15) |
| DW5/256/7 | Bi-lobe | 67.6 (256) | 102 (7) |
| DW6/172/12.5 | Piston | 45.4 (172) | 218 (15) |
| DW6/198/30 | Bi-lobe | 52.3 (198) | 435 (30) |
| DW6/308/15 | Bi-lobe | 81.4 (308) | 218 (15) |
| DW6/519/07 | Bi-lobe | 137.1 (519) | 102 (7) |
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Elastomer Material Standard elastomer material is EPDM. FPM and Isolast (perfluoroelastomer) are also available.
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Connections The standard connections are S-Line. Other sanitary and industrial fittings are available. |
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Rotor Options Two Rotor Options by Type Multi Duty Rotors are standard rotors suitable for most applications. The clearance is greater than that of the high efficiency rotors. High Efficiency Rotors are designed for low viscosity products. The size of the rotors has been increased and the clearance is minimal. NGA Rotors are made of Non Galling Alloy (W88) for use with low viscosity products. The material allows the rotors to touch the pump housing without damaging the housing or the rotors. Low tolerances may therefore be applied without decreasing the reliability. Bi-lobe rotors can be supplied as “high temperature” rotors, suitable for product temperatures up to 356°F (180°C). The rotors are smaller for expansion due to the temperature. |
 Lobe Type Rotor |
 Piston Type Rotor |
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Special Application Options |
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| Rectangular Inlet for extremely high viscosity products. By applying a rectangular inlet, the inlet conditions are considerably improved. | ||
| Thermal Jacket to provide a constant temperature level within the pump. This may be the solution for handling temperature-sensitive products such as chocolate. | ||
| Relief Valve releases pressure within the pump when it becomes too high. The relief valve is needed if no other safety devices are installed. |