CHEM-FEED® Multi-Diaphragm Metering Pump

The CHEM-FEED® MD1 Multi-Diaphragm Metering Pump does not lose prime when pumping chemicals that off-gas, thanks to the exclusive Hyperdrive Technology which creates smooth chemical feed.
Technical Overview:

GPH .0007 - 7.70 Enclosure Rating NEMA 4X (IP66)
LPH .0029 - 29.15 Standards NSF/ANSI 61, CE, cETLus, RoHS
PSI 150 Control Methods Manual, Remote Analog
Bar 10.3 Power Supply 100 to 240VAC-50/60Hz


  • 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
Superior Design:
  • 3 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 42 °C
Maximum Viscosity:
  • 1,000 Centipoise
Maximum Suction Lift:
  • 20 ft. at 0 PSI
Operating Voltage Range:
  • 100 to 240VAC-50/60Hz
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)
  • Brushless DC, 50W
Duty Cycle:
  • Continuous
Turndown Ratio:
  • 10,000:1 (0.01% – 100%)
  • NEMA 4X (IP66), Valox® (PBT) thermoplastic
Maximum Overall Dimensions:
  • 8.17”W x 9.46”H x 10.38”D (20.74cm W x 24.02cm H x 26.36cm D)
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)



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Replacement Parts

ImageNameCatalog Number


MD1 Firmware Update
77790 208 KB August 30, 2021
MD1 Technical Data Sheet – 85000-155
64951 1.02 MB August 2, 2021
MD1 Instruction Manual – 80000-614
64950 2.5 MB October 19, 2021

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