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DW Series - Rotary Lobe Pumps
DW - A rotary lobe pump with high volumetric efficiency and versatility.
FEATURES
The DW series is a rotary lobe pump. The 26 DW models are hygienic, 3-A and EHEDG approved and cover all requirements from 3 litres /100 revs to 1016/100 revs. Maximum pressure up to 435 psi (30 bar.) All product contact parts are AISI 316L stainless steel and elastomers comply with FDA-requirements.
Benefits
- High volumetric efficiency- The DW model range is designed according to the principle: 'More pump for your money'. Internal clearances have been minimized making the pump so efficient that in medium viscosity applications a smaller pump size than usual will do the job. This reduces both initial investment and running costs.
- Ultra-hygienic, accommodates harsh CIP-cycles - All DW models are CIP/SIP cleanable. The pumps are designed to withstand rapid temperature changes and can therefore accommodate very harsh CIP-cycles.
- Pulse-free performance - When pumping highly viscous products, the DW circumferential piston pumps run completely pulse-free. This ensures a constant process flow, as required for instance in connection with filling machines, safeguards valves, and other equipment that is liable to damage through pressure surges.
- Low NPSH-requirement - The highly improved suction capabilities of the DW pump considerably reduce the NPSH-requirement (Net Positive Suction Head required). In combination with the absence of pressure pulsations, this makes the DW pumps ideal for many applications, such as ultra-filtration.
- Gentle product handling - The rotor designs ensure maximum product integrity and minimize risk of potential damage to sensitive products. The circumferential piston rotors, as well as the new twin lobe rotors are suitable both for high and low viscosities and will also handle cheese curds and whey, soft fruit and meat which until now required fitting of special rotors.
- Easy Maintenance - The easy-to-access front loaded mechanical seals reduce maintenance time considerably. All shaft seal O-rings are identical and access to the shaft seal is achieved by simply removing the front cover and the rotors. Likewise, timing of rotors is an uncomplicated procedure.
- Low noise levels - Unique rotor design practically eliminates hydraulic noise and the helical gears minimize gearbox noise.
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.
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) |
Model DW1/003/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 8.54 | 1.57 | 1.5 | 4.29 | 4.76 | 0.47 | 5.75 | 5.9 | 6.53 | 4.8 | 7.6 | 3.7 | 3.27 | DN15 | 218 | 86 | 18 | 8 |
MM | 217 | 40 | 38 | 109 | 121 | 12 | 146 | 150 | 166 | 122 | 193 | 94 | 83 | 218 | 86 | 18 | 8 | 17 |
Weight: 37.48 lbs (17 Kg)
Oil Capacity: 0.21 GAL (0.8 L)
Model DW1/004/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 8.54 | 1.57 | 1.5 | 4.29 | 4.76 | 0.47 | 5.75 | 5.9 | 6.53 | 4.8 | 7.6 | 3.7 | 3.27 | DN15 | 8.58 | 3.38 | 0.71 | 0.31 |
MM | 217 | 40 | 38 | 109 | 121 | 12 | 146 | 150 | 166 | 122 | 193 | 94 | 83 | 218 | 86 | 18 | 8 |
Weight: 37.48 lbs (17 Kg)
Oil Capacity: 0.21 GAL (0.8 L)
Model DW1/007/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 8.74 | 1.57 | 1.5 | 4.29 | 4.76 | 0.47 | 5.75 | 5.9 | 6.53 | 4.8 | 7.6 | 3.7 | 3.27 | 1 | 8.58 | 3.38 | 0.71 | 0.31 |
MM | 222 | 40 | 38 | 109 | 121 | 12 | 146 | 150 | 166 | 122 | 193 | 94 | 83 | 25 | 218 | 86 | 18 | 8 |
Weight: 39.68 lbs (18 Kg)
Oil Capacity: 0.21 GAL (0.8 L)
Model DW2/006/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 9.76 | 1.97 | 1.42 | 4.72 | 5.59 | 0.67 | 6.93 | 7.01 | 7.64 | 5.71 | 8.98 | 4.41 | 3.82 | 1 | 9.92 | 3.86 | 0.87 | 0.47 |
MM | 248 | 50 | 36 | 120 | 142 | 17 | 176 | 178 | 194 | 145 | 228 | 112 | 97 | 25 | 252 | 98 | 22 | 12 |
Weight: 55.11 lbs (25 Kg)
Oil Capacity: 0.34 GAL (1.3 L)
Model DW2/007/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 9.76 | 1.97 | 1.42 | 4.72 | 5.59 | 0.67 | 6.93 | 7.01 | 7.64 | 5.71 | 8.98 | 4.41 | 3.82 | 1 | 9.92 | 3.86 | 0.87 | 0.47 |
MM | 248 | 50 | 36 | 120 | 142 | 17 | 176 | 178 | 194 | 145 | 228 | 112 | 97 | 25 | 252 | 98 | 22 | 12 |
Weight: 55.11 lbs (25 Kg)
Oil Capacity: 0.34 GAL (1.3 L)
Model DW2/013/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 9.92 | 1.97 | 1.42 | 4.72 | 5.59 | 0.67 | 6.93 | 7.01 | 7.64 | 5.71 | 8.98 | 4.41 | 3.82 | 1.5 | 9.92 | 3.86 | 0.87 | 0.47 |
MM | 252 | 50 | 36 | 120 | 142 | 17 | 176 | 178 | 194 | 145 | 228 | 112 | 97 | 38 | 252 | 98 | 22 | 12 |
Weight: 59.52 lbs (27 Kg)
Oil Capacity: 0.34 GAL (1.3 L)
Model DW3/014/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 10.67 | 2.36 | 1.57 | 4.84 | 6.3 | 0.79 | 7.87 | 7.72 | 8.35 | 6.22 | 9.92 | 4.72 | 4.17 | 1.5 | 10.75 | 4.41 | 0.98 | 0.51 |
MM | 271 | 60 | 40 | 123 | 160 | 20 | 200 | 196 | 212 | 158 | 252 | 120 | 106 | 38 | 273 | 112 | 25 | 13 |
Weight: 74.96 lbs (34 Kg)
Oil Capacity: 0.37 GAL (1.4 L)
Model DW3/017/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 10.67 | 2.36 | 1.57 | 4.84 | 6.3 | 0.79 | 7.87 | 7.72 | 8.35 | 6.22 | 9.92 | 4.72 | 4.17 | 1.5 | 10.75 | 4.41 | 0.98 | 0.51 |
MM | 271 | 60 | 40 | 123 | 160 | 20 | 200 | 196 | 212 | 158 | 252 | 120 | 106 | 38 | 273 | 112 | 25 | 13 |
Weight: 74.96 lbs (34 Kg)
Oil Capacity: 0.37 GAL (1.4 L)
Model DW3/030/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 11.02 | 2.36 | 1.57 | 4.84 | 6.3 | 0.79 | 7.87 | 7.72 | 8.35 | 6.22 | 9.92 | 4.72 | 4.17 | 2 | 10.75 | 4.41 | 0.98 | 0.51 |
MM | 280 | 60 | 40 | 123 | 160 | 20 | 200 | 196 | 212 | 158 | 252 | 120 | 106 | 51 | 273 | 112 | 25 | 13 |
Weight: 88.18 lbs (40 Kg)
Oil Capacity: 0.37 GAL (1.4 L)
Model DW3/050/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 11.97 | 2.36 | 1.57 | 4.84 | 6.3 | 0.79 | 7.87 | 7.72 | 8.35 | 6.22 | 9.92 | 4.72 | 4.17 | 2 | 10.75 | 4.41 | 0.98 | 0.51 |
MM | 304 | 60 | 40 | 123 | 160 | 20 | 200 | 196 | 212 | 158 | 252 | 120 | 106 | 51 | 273 | 112 | 25 | 13 |
Weight: 99.21 lbs (45 Kg)
Oil Capacity: 0.37 GAL (1.4 L)
Model DW4/033/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 13.86 | 3.15 | 1.77 | 6.38 | 8.07 | 0.79 | 9.64 | 9.37 | 10.24 | 7.48 | 11.81 | 5.59 | 5.12 | 2 | 12.91 | 5.12 | 1.38 | 0.55 |
MM | 352 | 80 | 45 | 162 | 205 | 20 | 245 | 238 | 260 | 190 | 300 | 142 | 130 | 51 | 328 | 130 | 35 | 14 |
Weight: 141.09 lbs (64 Kg)
Oil Capacity: 0.79 GAL (3.0 L)
Model DW4/039/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 14.37 | 3.15 | 1.77 | 6.38 | 8.07 | 0.79 | 9.64 | 9.37 | 10.24 | 7.48 | 11.81 | 5.59 | 5.12 | 3 | 12.91 | 5.12 | 1.38 | 0.55 |
MM | 365 | 80 | 45 | 162 | 205 | 20 | 245 | 238 | 238 | 260 | 190 | 300 | 142 | 130 | 76 | 328 | 130 | 35 |
Weight: 158.73 lbs (72 Kg)
Oil Capacity: 0.79 GAL (3.0 L)
Model DW4/073/-
Model DW4/125/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 15.71 | 3.15 | 1.77 | 6.38 | 8.07 | 0.79 | 9.64 | 9.37 | 10.24 | 7.48 | 11.81 | 5.59 | 5.12 | 3 | 12.91 | 5.12 | 1.38 | 0.55 |
MM | 399 | 80 | 45 | 162 | 205 | 20 | 245 | 238 | 260 | 190 | 300 | 142 | 130 | 76 | 328 | 130 | 35 | 14 |
Weight: 187.39 lbs (85 Kg)
Oil Capacity: 0.79 GAL (3.0 L)
Model DW5/080/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 18.86 | 4.17 | 2.79 | 9.13 | 10.31 | 0.98 | 12.28 | 11.93 | 12.83 | 9.45 | 14.57 | 6.97 | 6.42 | 2.5 | 17.09 | 6.5 | 1.65 | 0.67 |
MM | 479 | 106 | 71 | 232 | 262 | 25 | 312 | 303 | 326 | 240 | 370 | 177 | 163 | 63 | 434 | 165 | 42 | 17 |
Weight: 332.90 lbs (151 Kg)
Oil Capacity: 1.85 GAL (7.0 L)
Model DW5/093/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 18.86 | 4.17 | 2.79 | 9.13 | 10.31 | 0.98 | 12.28 | 11.93 | 12.83 | 9.45 | 14.57 | 6.97 | 6.42 | 2.5 | 17.09 | 6.5 | 1.65 | 0.67 |
MM | 479 | 106 | 71 | 232 | 262 | 25 | 312 | 303 | 326 | 240 | 370 | 177 | 163 | 63 | 434 | 165 | 42 | 17 |
Weight: 332.90 lbs (151 Kg)
Oil Capacity: 1.85 GAL (7.0 L)
Model DW5/142/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 19.49 | 4.17 | 2.79 | 9.13 | 10.31 | 0.98 | 12.28 | 11.93 | 12.83 | 9.45 | 14.57 | 6.97 | 6.42 | 3 | 17.09 | 6.5 | 1.65 | 0.67 |
MM | 495 | 106 | 71 | 232 | 262 | 25 | 312 | 303 | 326 | 240 | 370 | 177 | 163 | 76 | 434 | 165 | 42 | 17 |
Weight: 337.30 lbs (153 Kg)
Oil Capacity: 1.85 GAL (7.0 L)
Model DW5/256/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 20.47 | 4.17 | 2.79 | 9.13 | 10.31 | 0.98 | 12.28 | 11.93 | 12.83 | 9.45 | 14.57 | 6.97 | 6.42 | DN | 17.09 | 6.5 | 1.65 | 0.67 |
MM | 520 | 106 | 71 | 232 | 262 | 25 | 312 | 303 | 326 | 240 | 370 | 177 | 163 | 125 | 434 | 165 | 42 | 17 |
Weight: 379.19 lbs (172 Kg)
Oil Capacity: 1.85 GAL (7.0 L)
Model DW6/172/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 27.24 | 3.86 | 3.54 | 13.82 | 16.53 | 1.57 | 19.68 | 14.8 | 19.33 | 11.53 | 21.3 | 8.19 | 9.64 | 3 | 20.79 | 8.58 | 1.97 | 0.94 |
MM | 692 | 98 | 90 | 351 | 420 | 40 | 500 | 376 | 491 | 293 | 541 | 208 | 245 | 76 | 528 | 218 | 50 | 24 |
Weight: 815.71 lbs (370 Kg)
Oil Capacity: 6.60 GAL (25 L)
Model DW6/198/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 27.24 | 3.86 | 3.54 | 13.82 | 16.53 | 1.57 | 19.68 | 14.8 | 19.33 | 11.53 | 21.3 | 8.19 | 9.64 | 3 | 20.79 | 8.58 | 1.97 | 0.94 |
MM | 692 | 98 | 90 | 351 | 420 | 40 | 500 | 376 | 491 | 293 | 541 | 208 | 245 | 76 | 528 | 218 | 50 | 24 |
Weight: 815.71 lbs (370 Kg)
Oil Capacity: 6.60 GAL (25 L)
Model DW6/308/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 27.8 | 3.86 | 3.54 | 13.82 | 16.53 | 1.57 | 19.68 | 14.8 | 19.33 | 11.53 | 21.3 | 8.19 | 9.64 | 4 | 20.79 | 8.58 | 1.97 | 0.94 |
MM | 706 | 98 | 90 | 351 | 420 | 40 | 500 | 376 | 491 | 293 | 541 | 208 | 245 | 102 | 528 | 218 | 50 | 24 |
Weight: 859.80 lbs (390 Kg)
Oil Capacity: 6.60 GAL (25 L)
Model DW6/519/-
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B | C | D | E | F | G | H | J | K | L | M | N | P | Q | S | T | U | W | |
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IN | 28.82 | 3.86 | 3.54 | 13.82 | 16.53 | 1.57 | 19.68 | 14.8 | 19.33 | 11.53 | 21.3 | 8.19 | 9.64 | DN | 20.79 | 8.46 | 1.97 | 0.94 |
MM | 732 | 98 | 90 | 351 | 420 | 40 | 500 | 376 | 491 | 293 | 541 | 208 | 245 | 150 | 528 | 215 | 50 | 24 |
Weight: 1014.12 lbs (460 Kg)
Oil Capacity: 6.60 GAL (25 L)
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 The two rotor types, which are available in three different versions, are suitable for product temperatures up to 230°F (110°C). 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. |
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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. |