Products
The Hennvi EHN electromagnetic metering pump is a small, precision dosing device with a maximum stroke of 360 times per minute, and the flow rate can be steplessly adjusted during operation. Pump head flow materials include PVC, FRPP, PVDF, and stainless steel, with compatible silicon carbide, HC alloy, ceramics, fluororubber, PTFE sealing accessories compatible with various corrosive liquids; The self-priming height is up to 1.5 meters, available in 16W/24W power options, suitable for quantitative dosing of acidic and alkaline agents, water treatment dosing and electroplating solution ratios, with voltage options of 110V/220V.
Product Details
High-frequency reciprocating stroke, flow can be adjusted online during operationThe maximum stroke of the entire machine is 360 cycles per minute. The 16W model has a stroke adjustment range of 50%~100%, while the 24W model has a range of 40%~100%, allowing real-time adjustment of chemical output without shutdown. When water quality or chemical concentration fluctuates on the production line, dosing dosage can be quickly adjusted, adapting to 24-hour continuous automated production lines and reducing capacity loss caused by downtime adjustments.
A full range of corrosion-resistant overcurrent accessories, divided into specialized models for acid and alkali useThe standard pump head housing covers four types of materials: PVC, FRPP, PVDF, and stainless steel. The internal sealing diaphragm and valve ball can be optionally made of HC alloy, ceramics, fluororubber, or PTFE as needed; The models are divided into VC acidic and VH alkaline models. Low-concentration conventional chemicals, high-concentration hydrofluoric acid, and strong oxidative corrosive agents can all be matched with corresponding material solutions. A single pump can be adapted to various chemical application conditions.
1.5-meter maximum self-priming height, flexible installation arrangementThe equipment has a built-in self-priming structure. When the tank level is below the pump body, the maximum allowable height difference is 1.5 meters, so there is no need to raise the storage tank or install an additional foot valve; The entire machine is compact and lightweight, allowing integrated water treatment equipment and small dosing machine rooms to be installed directly on the ground, simplifying on-site pipeline installation.
Model power | Maximum output flow rate(L/h) | Maximum output pressure(MPa) | Stroke frequency(Times/minutes) | Stroke adjustment range | Diaphragm material | Overall machine weight |
EHN-B（16W） | 38 | 1 | 1~360 | 50%~100% | PTFE+EPDM Composite separator | 1.5kg |
EHN-B（16W） | 65 | 0.7 | 1~360 | 50%~100% | PTFE+EPDM Composite separator | 1.5kg |
EHN-B（16W） | 100 | 0.14 | 1~360 | 50%~100% | PTFE+EPDM Composite separator | 1.5kg |
EHN-B（24W） | 230 | 0.32 | 1~360 | 40%~100% | PTFE+EPDM Composite separator | 2.9kg |
EHN-B（24W） | 80 | 0.09 | 1~360 | 40%~100% | PTFE+EPDM Composite separator | 2.9kg |
EHN-B（24W） | 130 | 0.14 | 1~360 | 40%~100% | PTFE+EPDM Composite separator | 2.9kg |
EHN-B（24W） | 270 | 0.3 | 1~360 | 40%~100% | PTFE+EPDM Composite separator | 2.9kg |
EHN-B（24W） | 450 | 0.2 | 1~360 | 40%~100% | PTFE+EPDM Composite separator | 2.9kg |
The standard maximum self-priming height of the entire machine is 1.5 meters; Factory standard PTFE+EPDM composite separator; when transporting highly corrosive and strongly oxidizing chemicals, pure PTFE separators can be upgraded; The VC and VH model pump head casings are optimized for acidic and alkaline media, and can be upgraded to PVDF perfluorinated pump heads for handling highly corrosive agents such as hydrofluoric acid and chromic acid. Domestic standard uses 220V voltage, while exported overseas equipment can customize a 110V power supply version.
Pump head housing material compatibility classification: PVC is suitable for low-concentration acid-alkali temperatures (0~45°C), conventional water treatment disinfectants, and cannot be used in high-temperature solvents or high-concentration fluoride; FRPP is suitable for low- and medium-concentration acid-alkali and electroplating conventional chemicals at 10~60°C, cannot transport high-concentration strong oxidants or ketone organic solvents; PVDF is suitable for hydrofluoric acid at -20~80°C, high-concentration strong acids, and high-temperature corrosive chemicals, and can be stably used in most highly corrosive hazardous chemical conditions; 304/316 stainless steel is suitable for neutral pure water, food-grade chemicals, and mildly corrosive solvents; the transport of hydrochloric acid, hydrofluoric acid, and corrosive chemicals containing chloride ions is prohibited. Differences in sealing and separator accessory compatibility: PTFE+EPDM composite separators are universal models, suitable for conventional water treatment acid and alkali agents, offering high cost performance; Pure PTFE separators are suitable for strong oxidizing and fluorine-containing high-temperature corrosive solutions; Fluororubber FKM is suitable for oil-based organic solvents and high-temperature agents; HC alloy and ceramic valve balls are suitable for agents containing trace crystals and fine hard particles, offering wear-resistant and anti-jamming to ensure stable metering accuracy.
Mainly transports flocculants, PAC/PAM, sodium hypochlorite disinfectants, and pH acid-base neutralizing solution; For low flow conditions, the 16W model is selected; for the high-flow circulation system, the 24W model is selected. The online adjustable flow rate adapts to water quality fluctuations day and night. The 1.5-meter self-priming height allows direct extraction of chemicals from low-level underground storage tanks.
Conveys acidic etching solution, alkaline passivator, and plating tank adjustment solution. The acidic agent uses the VC model, the alkaline agent uses the VH model. The highly corrosive etching solution is paired with a PVDF pump head, and the PTFE diaphragm resists strongly corrosive electroplated solutions. The metering is stable and leak-proof, ensuring uniform coating coloration.
Conveys weak acid, strong base reaction additives, and trace catalysts, prioritizing the 24W high-power PVDF perfluorinated model. The perfluorine material is resistant to extreme corrosive agents, with high-frequency reciprocating strokes enabling precise microdosing, and is compatible with the sealed reactor automated feeding system.
Transports disinfectant chlorine agents and pH adjustment neutralizing agents, using a 16W low-flow PVC basic model. The compact and lightweight body can be directly integrated into small integrated pool units, automatically dosing micro-dosing to maintain water quality standards.
Transports high-purity acid and alkali detection reagents and weak corrosion test aids, using a 16W low-flow stainless steel pump head, with no metal ion precipitation contamination reagents, and precise low-flow output meets laboratory micro-mix requirements.
Medium acid-base matching specifications: acidic solutions must use VC model pump heads, alkaline solutions use VH models; High-concentration strongly corrosive agents require upgrading the PVDF housing; mismatched material selection can cause rapid corrosion and perforation of the pump head, leading to chemical leakage safety incidents.
Flow and power selection standards: For hourly dosing ≤ 100L, choose a 16W low-power model; for 100~450L/h high dosing capacity, choose a 24W model; Maximum flow rates must be matched according to peak chemical consumption on the production line; selecting too small will cause insufficient chemical dosage, affecting water quality and the quality of finished electroplated products.
Self-priming height usage limit: The vertical height difference between the storage tank liquid level and the pump body must not exceed 1.5 meters. Exceeding the limit self-priming height will cause intermittent drug suction, significant flow drop, and inaccurate metering accuracy. Large height differences require raising the drug barrel or installing foot valves on the suction pipeline.
Medium temperature adaptation requirements: For conventional chemicals within 45°C at room temperature, use PVC pump heads; for below 60°C, use FRPP; at 80°C for high-temperature corrosive agents, replace the PVDF high-temperature resistant pump head with pure PTFE separator; High temperatures accelerate the aging and cracking of PVC and EPDM rubber, leading to chemical leakage.
Explosion-proof operating specifications: When transporting alcohol and volatile ketone organic solvents, a custom explosion-proof electromagnetic drive unit is required; Standard standard models lack explosion-proof isolation protection, and solvent volatilization poses major safety hazards such as static electricity, fire, and explosion.
Requirements for Supporting Crystallized Reagents: In working conditions where the solution tends to precipitate salt crystals, it is necessary to upgrade to HC alloy and ceramic check valve assemblies, paired with thickened PTFE diaphragms; Crystalline particles easily jam the valve plate, causing liquid interruption in the pipeline and persistent measurement deviations.
Free professional chemical condition selection service: Based on the customer's chemical acidity and alkalinity, medium temperature, required dosing flow rate and pressure, and on-site self-priming height, we match the adapted drive power, pump head housing material, diaphragm valve accessories, and power supply voltage specifications. We simultaneously provide flow stroke calibration curves, complete machine CAD installation dimension drawings, and corrosion resistance comparison tables for various overcurrent materials. Non-standard customization services: Customizable PVDF perfluorinated corrosion-resistant pump heads, explosion-proof electromagnetic drive structures, 110V outlet voltage, HC alloy ceramic wear-resistant valve assemblies, extended corrosion-resistant suction pipelines, customized drawings, official quotations, and sample delivery within 5 working days. Original factory complete machine warranty service: electromagnetic drive motors and pump head housings enjoy full machine warranty; Vulnerable consumables such as diaphragms, check valves, and sealing gaskets are always in stock, with 48-hour fast shipping. We provide online remote video guidance to customers on screen replacement and output flow calibration. On-site metering calibration testing support: sample units can be delivered to customer sites for on-site testing of actual output flow, metering accuracy, and ultimate self-priming stability. On-site calibration meets standards before bulk procurement is conducted to avoid deviations in chemical dosing and product quality abnormalities or substandard water quality on the production line.
EHN electromagnetic metering pumps paired with chemical mixing storage tanks and high and low liquid level alarm devices, suitable for fully automatic integrated water treatment acid-base disinfection dosing equipment; The EHN-PVDF explosion-proof metering pump combined with a chemical reactor quantitative dosing system is suitable for sealed precision dosing units of highly corrosive and volatile organic solvent catalysts; EHN small 16W metering pump paired with small pool water circulation equipment, suitable for residential pool disinfection and automatic microdosing of pH adjustment agents; The EHN stainless steel metering pump, paired with a laboratory reagent mixing device, is suitable for precise quantitative delivery of high-purity reagents and mild corrosive additives in a small supporting system.
