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:

GPH .0007 – 7.70 Enclosure Rating NEMA 4X (IP66)
LPH .0029 – 29.15 Standards NSF/ANSI 61, CE, cETLus, RoHS
mL/min .0483 – 486 Control Methods Manual, Remote Analog
Pressure 150 PSI (10.3 Bar) 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:

  • 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:
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