Product Specifications

Performance for MD3S 

Maximum Flow/Pressure:

• 34.6 gph at 140 PSI 
• 37.9 gph at 90 PSI 
• 48.2 gph at 40 PSI 
• 52.6 gph at 0 PSI 

Maximum speed 100% = 190 Strokes/Min 

Fitting connections for MD3S pump 

“M” = 1/2” Male NPT (Straight and 90-degree elbow) 

“B” = 1/2” Hose Barb (Straight and 90-degree elbow) 

Maximum Viscosity: 1,000 Centipoise 

Maximum Suction Lift: 20 ft at sea level (14.7 atm psi) 

Electrical and Controls 

Electrical Power Requirement:  100 to 240VAC, 50/60Hz 

Motor: Brushless DC, 2,000:1 Turndown, Continuous Duty 

Power cord options available (6 feet in length): 

• 115VAC 50/60HZ, NEMA 5/15 plug  (U.S.) 
• 220VAC 50/60HZ ,CEE 7/V11 plug (EU) 
• 230VAC 50/60HZ, NEMA 6/15 (U.S.) (ordered separately) 
• 240VAC 50/60HZ, AS 3112 plug (Australia / New Zealand) (ordered separately) 
• 230VAC 50/60HZ, BS 1363/A plug (UK) (ordered separately) 

Inputs: 

• 4-20 mA – fully configurable  
• Frequency / Pulse input – fully configurable 
• Stop/Start Dry Contact Closure (Configurable for N.O. or N.C.) 
• Auto Prime or Auto Stop – Secondary Contact Closure 
• FVS (Flow Verification System) (Flow sensor provided by others) 

Outputs: 

• 4-20 mA output – fully configurable  
• Frequency output (Open collector)  

• Four (4) Alarm Outputs – Programmable.  

Materials of Construction 

Non-wetted Components: 

• Enclosure: Valox / 413 Aluminum (Polyester powder coated) – NEMA 4X (IP 66) 
• Drive Enclosure: Valox (PBT) thermoplastic 
• Permanently lubricated sealed motor shaft support ball bearing. 
• Drive Enclosure Cover: Polycarbonate 
• Cover Screws: 300 Series stainless steel 
• Pump Head Cover: 316 Stainless Steel 
• Motor Shaft: Chrome-plated steel 
• DFD System Sensor pins: Hastelloy C-276 
• Power Cord: 3 conductor, SJTW-A water-resistant 
• Mounting Brackets and Hardware: 316 Stainless steel 

Wetted Components: 

• Pump Head: PVDF 
• Adapter Connections: PVDF 
• Valve Cartridges: PVDF 
• Valve Balls: Ceramic (optional PTFE) 
• Elastomers: TFE/P (optional EP) 
• Static Seals: TFE/P (optional EP) 
• Diaphragm: DiaFlex® (optional Flex-A-Prene®) 

Diaphragm  Options 

DiaFlex® Diaphragm – This material consists of a natural PVDF flexible single-layer design that is compatible with most acids and bases.  DiaFlex® is not compatible with sodium hydroxide or ammonia. 

Flex-A-Prene® Diaphragm – An excellent material for most water treatment applications. Chemically resistant to 50% sodium hydroxide and many others. 

Dimensions and Weights 

• Maximum Overall Dimensions: 16.125”W x 16.3”H x 14.1”D (40.9W x 41.4H x 35.9D cm) 
• Product Weight: 40 lb. (18 Kg) 
• Shipping Weight : 48 lb. (22 Kg) 

Agency Listings 

• CE  
• cETLus 
• RoHS Compliant 
• NSF 61 Listed 
• NEMA 4X 

FAQs