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CheckPoint MD Series Pumps are specifically developed to handle the most challenging
applications. The pump produces a leakproof, positive-displacement flow at rates up to
2,220 USG/H (8,403 L/H) and at pressures up to 2,500 PSIG (172 BARG). The MD delivers nearly maintenance-
free operation for your most demanding applications. It will handle the pressure, temperature, friction,
and suspended particle challenges of your worst applications with outstanding reliability.
- FLOW RANGE
10 to 2,220 USG/H
(37.85 to 8,403 L/H)
- PRESSURE
0 to 2,500 PSIG (172 BARG)
- CONTINUOUS FLOW
Sequentially-actuated multidiaphragm
design.
- HANDLES PARTICULATE
Plungerless & sealless - No
sliding friction.
- CHEMICALLY RESISTANT
All wetted parts are stainless
and other high grade metals,
with a wide choice of seal
materials.
- HIGHLY RELIABLE
Proven design offering "order
of magnitude" reliability
improvement.
- ZERO LEAKAGE
Diaphragm design offers
complete chemical isolation.
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additional info:
Performance Data
Flow Curves
Certified Drawings
Parts List
Operating Manual:
Sales Brochure |
HIGH RELIABILITY BALANCED-DIAPHRAGM DESIGN
The CheckPoint Series MD pump actuates multiple, hydraulically-balanced diaphragms housed within
a single manifold. The process pressure is constantly balanced by hydraulic pressure on its opposing side,
so the flexible diaphragms essentially experience no differential pressure - allowing high discharge pressures
without damage.
NEARLY PULSE-FREE FLOW
Each diaphragm is energized sequentially, and each has its own suction and discharge check internal
to the pump head. A unique "wobble plate" design efficiently converts the rotational energy of a motor,
which in turn actuates the diaphragms in series. The pump head internally assembles all suction and all
discharge cycles into single ports, delivering up to an incredible 90 discharge cycles per second.
ABILITY TO HANDLE PARTICULATE
The MD pump head can handle extreme operating conditions where no plunger pump could survive.
There are no sliding parts in contact with the chemical. The diaphragms do not contact a strike plate on
their power stroke, so particles slip right by without damage. The check valves, featuring low-mass poppets,
are extremely particle-tolerant and durable. There are no seals, just the highly-durable unstressed
diaphragm.
INDUSTRIAL STRENGTH CONSTRUCTION
The pump head is constructed of 316LSS, 17-4PH, NitronicTM, HastelloyTM, KynarTM, and other chemically-
resistant materials throughout. This pump is appropriate for any offshore or plant conditions.
"PLUG & PLAY" PACKAGES
CheckPoint can skid-mount any MD Series pump with an electric motor by belt or direct-drive, complete
with all necessary components, including a speed or flow control valve, gauges, pipework, pulsation control,
etceteras.
1. Drive Shaft - via electric motor, hydraulic
motor, belt and pulley, etc.
2. Roller bearings - rigid support, immersed in
lubricating oil bath.
3. Fixed-angle cam - translates rotary motion
into linear to the hydraulic cells.
4. Hydraulic cells - displace diaphragms via
pressurized oil.
5. Diaphragms - hydraulically balanced, no
stress during flexing.
6. Inlet valve assemblies - simple design, allows
liquid into pump chamber.
7. Outlet valve assemblies - allows liquid to flow
into pressure discharge line.
8. Pressure regulating valve - controls output
pressure and prevents pump overload.
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SPECIFICATIONS |
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MDA |
MDB |
MDC |
MDD |
MDE |
MDF |
| Max Pressure |
(PSIG) |
1,200 |
2,500 |
1,000 |
2,500 |
1,000 |
1,200 |
| |
(BARG) |
83 |
172 |
69 |
172 |
69 |
83 |
| Diaphragms |
|
3 |
3 |
3 |
5 |
3 |
5 |
| Max Flow |
(USG/H) |
180 |
180 |
480 |
804 |
1,200 |
2,220 |
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(L/H) |
681 |
681 |
1,817 |
3,043 |
4,542 |
8,403 |
| Max Speed |
(RPM) |
1,750 |
1,750 |
1,750 |
1,450 |
1,150 |
1,150 |
| Suction Port |
(FNPT) |
1/2" |
1/2" |
1" |
1-1/4" |
1-1/2" |
2-1/2" |
| Discharge Port |
(FNPT) |
3/8" |
1/2" |
3/4" |
3/4" |
1" |
1-1/4" |
| Power |
(HP) |
2-1/4 |
5-1/4 |
6 |
21 |
15 |
33 |
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(KW) |
1.68 |
4 |
4.4 |
15.3 |
11 |
24 |
| Weight |
(LB) |
28 |
37 |
48 |
145 |
125 |
240 |
| |
(KG) |
13 |
17 |
22 |
66 |
57 |
109 |
flow curves : MD Series
MDA
MDB
MDC
MDD
MDE
MDF
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