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CHEM-FEED® Multi-Diaphragm Metering Pump

The MD1 Multi-Diaphragm Metering Pump delivers smooth, continuous chemical feed even when injecting chemicals that off-gas like Peracetic Acid and Sodium Hypochlorite.  The cutting-edge Hyperdrive Technology allows for alternating pumping action between two diaphragms: when one diaphragm is in the suction phase, the other is in the discharge, resulting in a smooth chemical feed profile and minimizing the risk of vapor lock.

The MD1’s exclusive DiaFlex® Diaphragms will last the life of the pump, eliminating the need for expensive rebuild kits. 

Technical Overview:

.0008 - 8.5
.003 - 32.2
.054 - 536.3
150 PSI (10.3 Bar)
Enclosure Rating
NEMA 4X (IP66)
Control Methods
Manual, Remote Analog
Power Supply
100 to 240VAC-50/60Hz
3D Visualizer


  • Exclusive Hyperlink Drive technology allows for smooth chemical feed – Patent Pending
  • Dual Diaphragm with full stroke technology will not lose prime, ideal for pumping chemicals that off-gas (Peracetic Acid, Sodium Hypochlorite)
  • Can pump chemicals continuously, like a peristaltic pump, without the need for tube assemblies
Communication & Interface:
  • Input: 4-20mA external control
  • Input: Remote Start/Stop: Non-powered dry contact closure for remote start/stop
  • Input: Compatible with Flow Verification Sensors S6A and Micro-Flo
  • Output: Alarm relay 250V / 3A
  • Output: Motor On / Off single solid-state
  • SCADA Inputs/Outputs include: 4-20mA.
Superior Design:
  • 5 Year Warranty
  • Energy-efficient BLDC motor will not overheat
  • Snap-in-place wall and floor mounting bracket – Patent pending
  • DiaFlex® diaphragm design will last the life of the pump, eliminates the need for expensive rebuild kits – Patented
  • Manifold design allows for multiple configuration possibilities – suction and discharge ports can be positioned on the left and right side of the pump
Safety Features:
  • Diaphragm Failure Detection (DFD) Senses diaphragm rupture by detecting chemical in the pump head. No false triggering – Patented
  • Lockout feature prevents any unwanted tampering – Patent pending
  • Display shield to protect controls from harsh environments
What’s Included:
  • MD1 Multi-Diaphragm Metering Pump
  • Discharge injection fitting with check valve
  • Suction foot valve / strainer
  • Suction ceramic weight
  • Mounting hardware kit
  • Display shield



Maximum Working Pressure:
  • 150 psig (10.3 bar)
Maximum Fluid Temperature:
  • 185 °F (85 °C)
Maximum Ambient Temperature:
  • 14 to 115 °F/ -10 to 46 °C
Maximum Viscosity:
  • 1,000 Centipoise
Maximum Suction Lift:
  • 20 ft. at 0 PSI
Operating Voltage Range:
  • 115V60Hz 1 PH (0.6A max.)
  • 220V50Hz 1 PH (0.3A max.)
  • 230V60Hz 1 PH (0.3A max.)
  • 230V50Hz 1 PH (0.3A max.)
  • 240V50Hz 1 PH (0.3A max.)
Power Cord Options:
  • 115V/60Hz = NEMA 5/15 (USA)
  • 230V/60Hz = NEMA 6/15 (USA)
  • 220V/60Hz = CEE 7/VII (EU)
  • 240V/60Hz = AS 3112 (Australia/New Zealand)
  • 230V 50/60Hz = BS 1363/A (United Kingdom)
  • Brushless DC, 50W
Duty Cycle:
  • Continuous
Turndown Ratio:
  • 10,000:1 (0.01% – 100%) Max. rpm = 100
  • NEMA 4X (IP66), Valox® (PBT) & PA12
Maximum Overall Dimensions:
  • 7.25”W x 9”H x 10”D (18.5 W x 22.9 H x 25.2 D cm)
Product Weight:
  • 8.5 lb. (3.8 Kg)
Approximate Shipping Dimensions:
  • 10.5” W x 13.75” H x 11” D (26.7 W x 35 H x 28 D cm)
Approximate Shipping Weight:
  • 15.5 lb. (7.0 Kg)
RoHS Compliant
  • Yes
  • NSF/ANSI 61, cETLus, CE



Replacement Parts

ImageNameCatalog Number


CHEM-FEED Municipal Comparison Chart
3.15 MB May 17, 2022
DiaFlex Diaphragms Brochure – 80000-727
1.61 MB July 24, 2023
MD1 Brochure – 80000-711
5.75 MB July 11, 2023
MD1 Firmware Update
208 KB May 10, 2023
MD1 Instruction Manual – 80000-614
10.3 MB September 20, 2023
MD1 Technical Data Sheet – 85000-155
1.02 MB September 8, 2023
Municipal Accessories Guide – 85000-178
1,021.20 KB April 29, 2022
Municipal Brochure
11.69 MB July 6, 2022
Municipal Catalog 2023 – 80000-708
13.09 MB August 8, 2023

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