Metering Pumps
Metering pumps & dosing systems.
Also called: dosing pump, chemical injection pump, controlled-volume pump, diaphragm metering pump.
Controlled-volume plunger and diaphragm metering pumps with a polar-crank mechanism, accurate to ±1%, from a few cc/hr to 15,000 l/hr.
- Flow
- 0.76 – 15,000 l/h (up to 15 m³/h · 66 US GPM)
- Accuracy
- ±1%, adjustable 0–100% while running
- Max. pressure (plunger head)
- 700 kg/cm² (686 bar · 9,956 psi)
- Control
- Manual, 3–15 psi pneumatic or 4–20 mA electric
Power end mechanism
Zero to full stroke, while it runs.
A precision-made high-speed worm drives a worm gear that rotates on an adjustable plane. Stroke length is set from zero to 100%, with the pump stopped or running, by micrometric knob or by pneumatic or electric actuator.
Liquid heads
A head for every liquid.
Plunger type
Single or double valve assembly for general dosing.
Jacketed
Heated or cooled heads for liquids with high melting points.
Single diaphragm
For toxic liquids.
Double diaphragm
For highly toxic liquids, with an optional rupture alarm system.
Double acting
For large capacities.
Valves
Single and double ball, poppet with or without spring loading, and flat valves.
Diaphragm metering pumps
Hermetically sealed. Up to 385 kg/cm².
Hydraulically flexed diaphragm pumps for all gear sizes, from a few cc/hr to over 15,000 LPH. The plunger packing runs in clean hydraulic fluid, and a rugged diaphragm separates it from the metered liquid.
- Hermetically sealed, with no leakage to atmosphere
- Relief and replenishing valves in the hydraulic circuit
- Better resistance to fouling
- Long life from the PTFE diaphragm and gentle flow
- Double and sandwich diaphragms with rupture detection
Automation & variations
Ready for your control room.
Pneumatic stroke control
Operated by a 3–15 psi air signal.
Electric stroke control
Operated by a 4–20 mA signal for remote control and automation.
Up to ten heads
Multiplex pumps of different type and capacity on a single prime mover.
Jacketed diaphragm heads
For liquids that must be heated or cooled.
Stainless steel diaphragms
For duties beyond PTFE.
Remote-head diaphragm pumps
Keep the drive away from the process.
Capacity chart
BPPL series at a glance.
Flow in litres per hour at 100 and 150 strokes per minute. Intermediate capacities and stroking speeds of 34, 64, 72 and 150 SPM are also available.
| Model | Plunger (mm) | l/hr @ 100 SPM | l/hr @ 150 SPM | Discharge pressure (kg/cm²) | Std. connection (BSP) |
|---|---|---|---|---|---|
| BPPL 1125 | 3 | 0.76 | 1.13 | 400 | |
| 5 | 2.00 | 3.00 | 400 | ||
| 8 | 5.40 | 8.00 | 238 | ||
| 12 | 12.00 | 18.00 | 106 | ½" | |
| 20 | 34.00 | 51.00 | 37 | ||
| 30 | 76.00 | 114.00 | 16 | ||
| 40 | 135.00 | 203.00 | 9 | ||
| 50 | 210.00 | 315.00 | 8 | ||
| 55 | 255.00 | 380.00 | 5 | ¾" | |
| 60 | 320.00 | 480.00 | 4 | ||
| BPPL 1750 | 3 | 0.95 | 1.40 | 700 | |
| 5 | 2.60 | 3.90 | 700 | ||
| 8 | 6.75 | 5.70 | 500 | ||
| 12 | 15.00 | 23.00 | 136 | ½" | |
| 20 | 42.00 | 63.00 | 85 | ||
| 30 | 95.00 | 143.00 | 38 | ||
| 42 | 186.00 | 280.00 | 19 | ||
| 50 | 265.00 | 397.00 | 13 | ¾" | |
| 62 | 430.00 | 645.00 | 7 | ||
| BPPL 2250 | 10 | 17 | 25 | 400 | |
| 12 | 24 | 36 | 276 | ½" | |
| 20 | 68 | 101 | 101 | ||
| 30 | 152 | 228 | 44 | ||
| 40 | 270 | 406 | 25 | ¾" | |
| 50 | 424 | 635 | 16 | ||
| 56 | 530 | 796 | 12 | ||
| 60 | 610 | 914 | 11 | 1" | |
| 70 | 830 | 1244 | 8 | ||
| 76 | 980 | 1466 | 6 | 1½" | |
| BPPL 3000 | 12 | 30 | 46 | 580 | |
| 16 | 54 | 81 | 330 | ½" | |
| 20 | 85 | 127 | 210 | ||
| 30 | 133 | 286 | 90 | ||
| 40 | 340 | 508 | 53 | ¾" | |
| 50 | 530 | 795 | 34 | ||
| 62 | 815 | 1222 | 22 | 1" | |
| 75 | 1192 | 1788 | 15 | ||
| 80 | 1356 | 2034 | 13 | ||
| 90 | 1716 | 2575 | 10 | 1½" | |
| 100 | 2119 | 3180 | 8 | ||
| BPPL 4000 | 25 | 165 | 246 | 200 | |
| 30 | 236 | 355 | 140 | ¾" | |
| 40 | 420 | 630 | 75 | ||
| 50 | 657 | 985 | 48 | 1" | |
| 60 | 946 | 1419 | 34 | ||
| 70 | 1288 | 1931 | 25 | ||
| 80 | 1682 | 2523 | 18 | 1½" | |
| 90 | 2128 | 3193 | 15 | ||
| 100 | 2628 | 3942 | 12 | ||
| 120 | 3784 | 5676 | 8 | 2" | |
| BPPL 5000 | 25 | 198 | 298 | 350 | |
| 40 | 508 | 763 | 136 | 1" | |
| 50 | 795 | 1192 | 85 | ||
| 70 | 1558 | 2336 | 45 | 1½" | |
| 85 | 2297 | 3445 | 34 | ||
| 100 | 3179 | 4768 | 20 | ||
| 125 | 4967 | 7451 | 13 | 2" | |
| 150 | 7153 | 10729 | 9 | ||
| 177 | 9736 | 15000 | 7 | 2½" |
Capacities assume 90% volumetric efficiency and may change with discharge pressure. Connection sizes are shown against the plunger size where they appear on the original chart. Data subject to change without notice.
Packaged dosing systems
Turnkey chemical dosing.
Self-contained units with metering pumps, tanks, stirrers, strainers, instruments, piping and valves, skid or trolley mounted, or engineered to your exact requirement.
Special features
- Compact, robust, light-weight and accurate
- Wide capacity range
- Totally enclosed, water- and dust-proof housing
- Fully automatic lubrication
- Remote control by pneumatic or electric actuation
- Easy availability of spares
- Every pump fully tested before shipment
Accessories
- Relief valve
- Flanged connection
- Pulsation dampeners
- Back-pressure regulator
- Suction strainers
- Trolley / skid
Get a price for your duty.
Share the liquid, flow, pressure and suction conditions. Our engineers will recommend the right model, plunger and materials.