Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm - Compact Solenoid-Driven Diaphragm Metering Pumps
LMI PUMPSCompact Solenoid-Driven Diaphragm Metering Pumps

LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm

The LMI PUMPS Chemical Metering Pump is a compact solenoid-driven diaphragm metering pump (model E721-D68HI) with a PTFE diaphragm, PVDF fittings, ceramic check balls, and Polyprel seals. It operates at 115V AC and…

SKU 3G-OTH-87452

Brand
LMI PUMPS
Item
Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm
Category
Compact Solenoid-Driven Diaphragm Metering Pumps
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

LMI PUMPS
Manufacturer Part Number
E721-D68HI
Type
PVC Head, PTFE Diaphragm, 4 gpd Max. Flow Rate
AC
115V
Seal Material
Polyprel
Reproducibility
±1.0%
Fitting Material
PVDF
Nameplate Voltage
115V AC
Diaphragm Material
PTFE
Check Ball Material
Ceramic
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

LMI PUMPS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The LMI PUMPS Chemical Metering Pump is a compact solenoid-driven diaphragm metering pump (model E721-D68HI) with a PTFE diaphragm, PVDF fittings, ceramic check balls, and Polyprel seals. It operates at 115V AC and delivers a maximum flow rate of 4 gpd with ±1.0% reproducibility.

Frequently Asked Questions

What is the LMI PUMPS Chemical Metering Pump used for?

The LMI PUMPS Chemical Metering Pump (model E721-D68HI) is used for precise chemical dosing in water treatment, industrial processing, and chemical injection applications. Its solenoid-driven diaphragm design delivers consistent flow with ±1.0% reproducibility, making it suitable for metering acids, bases, and other liquids.

What are the specifications of the LMI PUMPS E721-D68HI?

The LMI PUMPS E721-D68HI is a compact solenoid-driven diaphragm metering pump with a PVC head, PTFE diaphragm, and PVDF fittings. It operates at 115V AC, delivers a maximum flow rate of 4 gpd, and features ceramic check balls and Polyprel seals for chemical resistance.

Where to buy the LMI PUMPS Chemical Metering Pump worldwide?

3G Electric supplies the LMI PUMPS Chemical Metering Pump (E721-D68HI) to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this model.

How to install a solenoid-driven metering pump like the LMI E721-D68HI?

Install the LMI E721-D68HI on a stable surface near the chemical source. Ensure the suction line is submerged and the discharge line is free of kinks. Prime the pump by filling the head with liquid before starting. Follow LMI PUMPS guidelines for electrical connections and calibration.

Used in

Common applications for LMI PUMPS
Water treatment — LMI PUMPS B111 series for chlorine dosing in municipal water disinfection systems
Cooling tower chemical feed — LMI PUMPS C741 series for injecting corrosion inhibitors and biocides
Boiler water treatment — LMI PUMPS PD051 series for precise caustic and phosphate dosing
Wastewater disinfection — LMI PUMPS B741 series for sodium hypochlorite metering in effluent treatment
Industrial process chemical injection — LMI PUMPS C111 series for acid dosing in metal finishing baths
Chemical manufacturing — LMI PUMPS PD741 series for polymer addition in batch processing

LMI PUMPS Products

3G Electric supplies LMI PUMPS compact solenoid-driven diaphragm metering pumps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Pump Accessories →Valves & Regulation →Motors & Drives →All Products →

Similar products

Matched by specification & description
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-368SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PVDF/Polyprel.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-368SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PVDF/Polyprel.
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-468SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PVDF/Polyprel.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-468SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PVDF/Polyprel.
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PP Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-465NI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVDF; Seal Material: PTFE.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PP Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-465NI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVDF; Seal Material: PTFE.
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-368NI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVDF; Seal Material: PVDF/Polyprel.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-368NI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVDF; Seal Material: PVDF/Polyprel.
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 60 gpd Max. Flow Rate (MPN B721-490SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PVDF/Polyprel.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 60 gpd Max. Flow Rate (MPN B721-490SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PVDF/Polyprel.
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PP Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-75HV). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: 316 SS; Fitting Material: PP; Seal Material: PTFE.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PP Head, PTFE Diaphragm, 4 gpd Max. Flow Rate (MPN E721-75HV). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: 316 SS; Fitting Material: PP; Seal Material: PTFE.

More from LMI PUMPS

View all LMI PUMPS parts →
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 1000:1, Thermoplastic (MPN B141-D10HI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: Polyprel.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 1000:1, Thermoplastic (MPN B141-D10HI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: Polyprel.
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 1000:1, Thermoplastic (MPN B911-D98HI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: Polyprel.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 1000:1, Thermoplastic (MPN B911-D98HI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: Polyprel.
LMI PUMPS Chemical Metering Pump: Solenoid, 115/230V AC, PVC Head, PTFE Diaphragm, 200:1, PVC, PVC (MPN PD751-938SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±3.0%; Control Programs: Tank Level Input; Nameplate Voltage: 115/230V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: Polyprel.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115/230V AC, PVC Head, PTFE Diaphragm, 200:1, PVC, PVC (MPN PD751-938SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±3.0%; Control Programs: Tank Level Input; Nameplate Voltage: 115/230V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: Polyprel.
LMI PUMPS Chemical Metering Pump: Solenoid, 115/230V AC, PVC Head, PTFE Diaphragm, 200:1, PVC, PVC (MPN PD741-828SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±3.0%; Control Programs: Tank Level Input; Nameplate Voltage: 115/230V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PTFE/Polyprel.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115/230V AC, PVC Head, PTFE Diaphragm, 200:1, PVC, PVC (MPN PD741-828SI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±3.0%; Control Programs: Tank Level Input; Nameplate Voltage: 115/230V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PTFE/Polyprel.
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 1000:1, Thermoplastic (MPN C141-34). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PTFE.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, PVC Head, PTFE Diaphragm, 1000:1, Thermoplastic (MPN C141-34). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: PTFE.
LMI PUMPS Chemical Metering Pump: Solenoid, 115/230V AC, PVDF Head, PTFE Diaphragm, 200:1, PVDF (MPN PD051-833NI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±3.0%; Nameplate Voltage: 115/230V AC; Check Ball Material: Ceramic; Fitting Material: PVDF; Seal Material: PTFE.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115/230V AC, PVDF Head, PTFE Diaphragm, 200:1, PVDF (MPN PD051-833NI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±3.0%; Nameplate Voltage: 115/230V AC; Check Ball Material: Ceramic; Fitting Material: PVDF; Seal Material: PTFE.
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, 316 SS Head, PTFE Diaphragm, 1000:1, 316 SS (MPN B711-297). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: 316 SS; Fitting Material: 316 SS; Seal Material: 316 SS.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115V AC, 316 SS Head, PTFE Diaphragm, 1000:1, 316 SS (MPN B711-297). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±1.0%; Nameplate Voltage: 115V AC; Check Ball Material: 316 SS; Fitting Material: 316 SS; Seal Material: 316 SS.
LMI PUMPS Chemical Metering Pump: Solenoid, 115/230V AC, PVC Head, PTFE Diaphragm, 200:1, PVC, PVC (MPN PD751-938NI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±3.0%; Control Programs: Tank Level Input; Nameplate Voltage: 115/230V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: Polyprel.
LMI PUMPS
LMI PUMPS Chemical Metering Pump: Solenoid, 115/230V AC, PVC Head, PTFE Diaphragm, 200:1, PVC, PVC (MPN PD751-938NI). Key specifications — Brand: LMI PUMPS; Diaphragm Material: PTFE; Reproducibility: ±3.0%; Control Programs: Tank Level Input; Nameplate Voltage: 115/230V AC; Check Ball Material: Ceramic; Fitting Material: PVC; Seal Material: Polyprel.