- 3-diaphragm designs.
- Ideal for air blast sprayers, poultry house washers and industrial machinery.
- All fluid end-housing components are anodized aluminum.
- Valves are stainless steel with exclusive spheric section shaped design for perfect sealing.
- Diaphragms are made from chemical resistant elastomers, which increases the pump's life even when they are used with aggressive agricultural and industrial chemicals.
The John Blue High-Pressure Diaphragm Pumps are an excellent choice for high-pressure sprayers, such as air blast sprayers and poultry house washers and industrial machinery. These three and four diaphragm semi hydraulic diaphragm pumps are designed to ensure a perfect mechanical balance and better volumetric distribution of the liquid. The John Blue High-Pressure Diaphragm Pumps are factory equipped with the unique pulsation dampening system with 34 holes that absorbs pulsation pressure on all pistons equally.
All fluid end-housing components are anodized aluminum. The valves are stainless steel with exclusive spheric section shaped design for perfect sealing. Our diaphragms are made from chemical resistant elastomers, which increases the pump's life even when they are used with aggressive agricultural and industrial chemicals.
Features & Benefits:
- Oversized, separate suction and pressure circuits create a smooth flow of the liquid product with no pressure loss.
- Convenient visual oil tank fitted with matched diaphragm to ensure correct oil level.
- Check valves can be serviced easily, minimum maintenance.
- Crankshaft stroke reduced, which increases diaphragm life because diaphragms are not stressed.
- Unique pulsation damper system provides dampening on 32 circuits instead of one, which reduces vibrations and allows for smoother operation.
- Four diaphragm material options are available, contact factory.
- Special check valve design: unique spherical shaped poppet and conical seat made of 316 stainless steel, delivering high volumetric efficiencies.
- Pre-set diaphragm bolt and diaphragm washer are made from 316 stainless steel. This exclusive feature ensures chemical resistance and longer life of the pump.
- Two piston rings for each piston, this exclusive design increases diaphragm efficiency.
- Parts in contact with chemical products are constructed with die-cast aluminum, covered with special corrosion proof treatment.
Exclusive Technology: Pumps come standard with internal pressure dampener. Standard, interchangeable parts for reduced inventory and best service. Full range: 2, 3, 4, 5, 6 diaphragms available.
Part Breakdown
| Reference Number | Part Number | Description | Required |
| 1 | DP-95004031 | BUNA-N PISTON DIAPHRAGM | 3 |
| 2 | DP-35980297 | VALVES ASSEMBLY | 6 |
| 6 | DP-86275200 | SCREW M8X35 | 18 |
| 7 | DP-41012097 | NBR BALLASTER DIAPHRAGM | 1 |
| 8 | DP-37010809 | BALLASTER COVER | 1 |
| 9 | DP-41010409 | LOWER BALLASTER | 1 |
| 10 | DP-80136900 | RING DIA. 52 | 1 |
| 11 | DP-80217810 | OIL SEAL DIA. | 1 |
| 12 | DP-37010961 | MOUNTAING RAIL | 2 |
| 13 | DP-86326500 | SCREW M10X25 | 8 |
| 14 | DP-37011209 | CRANKCASE 40X52X7 | 1 |
| 15 | DP-83506328 | 60 DEGREE ELBOW CONNECTOR G. 3/4 | 1 |
| 16 | SC-81490900 | BRASS G. 3/4 NUT | 1 |
| 17 | DP-84554410 | LEFT TAP G. 3/8-G.1/2 | 1 |
| 18 | DP-84554400 | RIGHT TAP G. 3/8-G.1/2 | 1 |
| 19 | DP-81291900 | ROLLER BEARING DIA. 40X80X18 | 1 |
| 21 | DP-41020619 | SHAFT RING | 1 |
| 22 | DP-41020509 | CONROD | 3 |
| 23 | DP-41020419 | CONROD HOLDING RING | 2 |
| 24 | DP-41020026 | CRANKSHAFT "VD" | 1 |
| 25 | DP-81291300 | BALL BEARING DIA. 40X90X23 | 1 |
| 26 | DP-80329500 | O-RING DIA. 3,53X190,1 | 1 |
| 27 | DP-80321070 | O-RING DIA. 2,62X126,67 | 1 |
| 28 | DP-80329100 | O-RING DIA. 3,53X88,5 | 1 |
| 29 | DP-41011209 | INLET COVER "VD" | 1 |
| 30 | DP-80219000 | OIL SEAL DIA. 40X72X10 | 1 |
| 31 | DP-14011632 | DIAPHRAGM SPACER | 1 |
| 35 | DP-80002100 | RING DIA. 15 | 6 |
| 36 | DP-85200700 | PISTON PIN DIA. 15X54 | 3 |
| 37 | DP-37001609 | PISTON DIA.70 | 3 |
| 38 | DP-81852700 | PISTON RING DIA. 70 | 6 |
| 39 | DP-43001501 | PISTON SLEEVE DIA. 70 | 3 |
| 40 | DP-41983597 | KIT DISK+ SCREW INOX | 3 |
| 41 | DP-86330000 | SCREW M10X30 | 12 |
| 42 | DP-41010909 | VALVE COVER | 3 |
| 43 | DP-80326200 | O-RING DIA. 3,53X41,28 | 6 |
| 44 | DP-80325100 | O-RING DIA. 3,53X32,93 | 6 |
| 45 | DP-80320000 | O-RING DIA. 2,62X22,22 | 6 |
| 46 | DP-41011109 | PUMP HEAD | 3 |
| 47 | DP-86425000 | SCREW M14X70 | 12 |
| 48 | DP-41011009 | VALVE COVER G. 3/8" | 3 |
| 49 | DP-82410700 | GASKET | 1 |
| 50 | DP-85257900 | CAP G. 3/8" | 1 |
| 51 | DP-28014432 | OIL FILLER CAP | 1 |
| 52 | DP-41001731 | OIL FILLER DIAPHRAGM | 1 |
| 53 | DP-55000432 | OIL FILLER | 1 |
| 54 | DP-80318000 | O-RING DIA. 2,62X15,08 | 1 |
| 55 | DP-84368550 | WASHER DIA. 8,2X15X1,5 | 2 |
| 56 | DP-86268250 | BOLT M8X25 | 2 |
| 57 | DP-80321910 | O-RING DIA. 3X30 | 1 |
| 58 | DP-82007000 | WING NUT G. 1-1/2" | 1 |
| 59 | DP-84057100 | 90 DEGREE ELBOW CONN DIA. 38 | 1 |
| 74 | DP-24305097 | SAFETY VALVE 50 BAR (OPT) | 1 |
| 75 | DP-81302400 | NEEDLE ROLLER BEARING | 2 |
| 76 | DP-82407900 | WASHER DIA.13 | 1 |
| 77 | DP-85254350 | CAP G. 1/4" | 1 |
Technical Specifications
- Part #:
- DP-291.1
- Manufacturer:
- CDS John Blue
- Material:
- Poly
- Opertion Manual:
- John Blue DP-291.1 Operation Manual
- Horsepower:
- 14
- Inlet:
- 1-1/2" HB Inlet
- Maximum Flow Rate (GPM):
- 29.1
- Maximum Pressure (PSI):
- 725
- Maximum RPM:
- 550
- Maximum Temperature (F°):
- 140
- Outlet:
- 3/4" NPT Outlet
- Material:
- Poly
- Opertion Manual:
- John Blue DP-291.1 Operation Manual
- Horsepower:
- 14
- Inlet:
- 1-1/2" HB Inlet
- Maximum Flow Rate (GPM):
- 29.1
- Maximum Pressure (PSI):
- 725
- Maximum RPM:
- 550
- Maximum Temperature (F°):
- 140
- Outlet:
- 3/4" NPT Outlet
- a_mpn:
- DP-291.1
