Pulsafeeder GreenLine Metering Pump, 20.6 GPH @ 145 PSI, VFD‑Controlled, 316 SS wet end
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Pulsafeeder GreenLine Metering Pump, 20.6 GPH @ 145 PSI, VFD‑Controlled, 316 SS wet end
The GreenLine‑GLM DM2DVAC is the highest‑capacity mechanically actuated diaphragm metering pump in the DM2 family, equipped with an integrated variable‑frequency drive (VFD) for smooth speed control and expanded turndown capability. It delivers 20.6 gph (78 lph) at 145 psi (10 bar) with a stroke rate of 175 spm. This model features a 316 SS liquid end for maximum durability and chemical resistance. The VFD accepts 115/230 V single‑phase input and outputs 230/460 V three‑phase power to a TEFC motor, making installation flexible while providing precise flow control for demanding chemical feed applications.
Specifications
- Max Flow: 20.6 gph (78 lph)
- Max Pressure: 145 psi (10 bar)
- SPM @ 60 Hz: 175 strokes/min
- Motor: 0.50 HP (0.37 kW), TEFC, VFD‑driven, 230/460 V output
- VFD Input: 115/230 V, 1‑phase
- VFD Output: 230/460 V, 3‑phase
- Suction Lift: 10 ft (3 m)
- Process Temperature: 32–113 °F (0–45 °C)
- Ambient Temperature: 32–113 °F (0–45 °C)
- Accuracy: ±2% of set point
- Stroke Adjustment: 0–100%, 1% resolution, auto‑locking
- Viscosity: up to 1,000 cPs
- Connections: 0.5″ FNPT suction / 0.5″ FNPT discharge
- Approximate Weight: 63 lb (pump with VFD + motor)
Materials of Construction
- Wet End: 316L Stainless Steel (head, valve guides, valve seats, valve caps, check balls)
- Valve O‑Rings: PTFE
- Diaphragm: Composite PTFE, double‑sided PTFE coating
- Check Valves: Stainless steel or ceramic
- Housing: Epoxy‑painted aluminum
- Hardware: Stainless steel
- Lubrication: Oil bath gearbox with accessible fill and sight glass
Key Features & Benefits
- Integrated VFD for smooth speed control and expanded turndown
- 316 SS liquid end provides excellent durability and chemical resistance
- VFD accepts 115/230 V single‑phase input for simplified installation
- Mechanically actuated diaphragm design ensures long service life
- Auto‑locking stroke adjustment for drift‑free accuracy
- Spherically uniform velocity check valves improve priming and reduce turbulence
- Compact, sealed gearbox reduces noise and protects internal components
- NSF/ANSI/CAN 61 and NSF/ANSI 372 certified for many water treatment applications
Markets & Typical Applications
- Municipal and industrial water & wastewater treatment
- Power generation and boiler feed chemical dosing
- Chemical processing, refining, and petrochemical services
- Mining, metals, and mineral processing
- Applications requiring variable flow control with stainless steel construction
| Product Type: | Diaphragm Metering Pump, Mechanically Driven |
| Brand: | Pulsafeeder |
| Product Line: | GreenLine |
| Housing: | Epoxy Painted Aluminum |
| Max Flow (GPH): | 20.6 |
| Max Flow (GPD): | 494.4 |
| Max Pressure (PSI): | 145 |
| Max Viscosity (CPS): | 1000 |
| Max Strokes per Minute: | 175 |
| Flow Control: | 4-20mA or 0-10VDC signal input controls stroke frequency, Manual stroke length adjustment (0 to 100%) |
| Turn Down Ratio: | 100:1 |
| Head/Fittings: | 316 SS / 316 SS |
| Valve Balls: | 316 SS |
| Diaphragm: | Composite PTFE |
| Valve / Seat / O-Ring: | 316 SS / PTFE |
| Motor: | TEFC - NEMA 56C, 1/2 Hp, 230/460 VAC, 50/60 Hz, 3 Phase |
| Connections: | 1/2" FNPT |
| Power Supply: | 115/230 VAC, 50/60 Hz, 1 Phase |
| Operating Modes: | Manual, (VFD 10:1) |
| Warranty: | 2 Year Limited Warranty |
| Net Weight: | 54.5 lbs |
| Packaging: | Each |
| Includes: | Installation, Operation, and Maintenance Instruction Manual |
| Working Environment: | 32 to 113°F (0 to 45°C) |
