sales@xo-pump.com

WhatsApp :+8615680632715

Home

Products Center

Address：2006, Block C, Tianshan Galaxy Plaza, No. 358 Yuhua East Road, Shijiazhuang, Hebei Province, China

E-mial：sales@xo-pump.com

WhatsApp: +8615680632715

E-mial：info@xo-pump.com

WhatsApp: +8615364966178

DJ‑D2 Diaphragm Metering Pump

Commodity name： DJ‑D2 Diaphragm Metering Pump

Category:

WhatsApp:

WhatsApp:

Email:

Email:

Description

DJ-D2 Mechanical Diaphragm Metering Pump Product Details
1. Product Overview
The DJ-D2 mechanical diaphragm metering pump is an economical high-precision quantitative conveying equipment featuring large flow rate, low pressure universality, high protection grade and ultra-high durability, forming a perfect working condition complement with DY series hydraulic diaphragm pumps and DZ series plunger pumps. Different from the high-pressure heavy-duty positioning of hydraulic and plunger pumps, this model is specially designed for 0.3–0.5MPa low-pressure general working conditions and 0–5800L/h super-large flow quantitative dosing. It focuses on simple structure, zero-threshold maintenance, all-weather stable operation and wide medium adaptability, serving as the standard core equipment for low-pressure large-flow mass production scenarios such as municipal water treatment, general chemical industry, light industry manufacturing and environmental protection desulfurization and denitrification.
Adopting a mature worm gear mechanical drive structure, it completely isolates the process medium from the drive lubrication mechanism based on the flexible diaphragm reciprocating positive displacement principle, fundamentally eliminating oil pollution, medium leakage and core machine corrosion. Equipped with high-quality PTFE and rubber composite diaphragms, it combines the high elasticity of rubber and strong corrosion resistance of PTFE, greatly improving the diaphragm's fatigue resistance, aging resistance and acid-base corrosion resistance, with a service life far exceeding that of ordinary single-layer diaphragms. With the industrial-grade IP55 high protection rating, it operates stably in a wide temperature range of -30℃～60℃. Optional PVC, PTFE, 304 stainless steel and 316L stainless steel pump heads adapt to various corrosive and non-corrosive liquids without solid particles. Supporting manual and automatic dual-mode stepless flow regulation, it achieves excellent cost performance and long-term stability.
2. Core Product Advantages
Exclusive Low-pressure Large-flow Adaptation, Efficient Working Condition Matching
Different from the high-pressure heavy-duty positioning of DY and DZ series, the DJ-D2 is tailor-made for 0.3–0.5MPa conventional low-pressure industrial scenarios, avoiding performance redundancy and high cost of high-pressure models. The maximum 5800L/h stepless adjustable large flow perfectly meets the low-pressure demands of large-scale water treatment, batch chemical liquid preparation and continuous production additive dosing, with uniform flow output and stable proportioning, becoming the optimal cost-effective choice for low-pressure large-flow quantitative conveying.
Composite Double-layer Diaphragm, Enhanced Corrosion Resistance & Extended Service Life
Abandoning the defects of easy corrosion, fatigue and damage of traditional single-layer diaphragms, the custom PTFE+rubber composite diaphragm is adopted. The inner rubber layer provides high flexibility and stable rebound for reciprocating deformation, while the outer PTFE layer directly contacts the medium to resist strong acid, alkali and organic solvent corrosion without scaling or crystal adhesion. The double-layer structure balances toughness and corrosion resistance, effectively reducing diaphragm loss under long-term low-pressure continuous operation and cutting maintenance frequency and cost significantly.
Fully Isolated Pollution-free Structure, Pure Medium Delivery
The fully isolated mechanical diaphragm structure completely separates the flowing medium from the internal drive lubrication system, ensuring that lubricating oil and mechanical impurities never enter the medium cavity. It thoroughly eliminates secondary medium pollution, oil mixing and water quality exceeding standards, adapting to scenarios with strict purity requirements such as water purification treatment, light industry food and high-purity reagent deployment to ensure stable material quality and process consistency.
IP55 High Protection & Ultra-wide Temperature Range, All-weather Durable Operation
Equipped with IP55 industrial dustproof and waterproof grade, it resists outdoor dust, rain splash and workshop humid gas erosion, adapting to open-air equipment areas, open workshops and humid chemical environments. The ultra-wide ambient temperature tolerance of -30℃～60℃ realizes low-temperature anti-freezing and high-temperature aging resistance, ensuring long-term stable operation in diverse regional and environmental conditions with stronger environmental adaptability than ordinary civil metering pumps.
Four Pump Head Materials, Full Coverage of Liquid Media
Four optional pump head materials (PVC, PTFE, 304/316L stainless steel) match diverse process media: PVC delivers high cost performance for clean water and weak corrosive media; PTFE specializes in strong acid, alkali and easily crystallized corrosive fluids; 304 stainless steel adapts to conventional industrial clean media; upgraded 316L stainless steel resists intergranular corrosion and precipitation, suitable for pharmaceutical, food and high-purity fine chemical clean production, covering all industrial particle-free liquid delivery scenarios.
Dual-mode Stepless Flow Regulation, Flexible Production Adaptability
Supporting 0–100% full-range stepless flow adjustment, the manual mode realizes on-site precise fine-tuning and parameter calibration, while the automatic mode connects seamlessly with PLC systems to achieve remote frequency conversion flow control, constant-volume continuous dosing and unattended operation. It adapts to multi-formula and multi-batch flexible production lines with convenient commissioning without shutdown and disassembly, matching modern industrial production rhythm.
Minimal Mechanical Structure, Low Failure Rate & Zero-complex Maintenance
Adopting a direct worm gear mechanical drive structure, it features stable transmission, simplified structure, no complex hydraulic oil circuit and no precise high-pressure vulnerable parts with extremely low failure rate. Compact in size and easy to install and operate, it only requires routine inspection without professional maintenance, supporting 24-hour uninterrupted continuous mass production with long-term stability and low comprehensive operating cost.
3. Working Principle
The DJ-D2 mechanical diaphragm metering pump adopts the mechanically driven diaphragm reciprocating positive displacement quantitative conveying principle. The two-phase/three-phase standard or explosion-proof motor drives the worm gear transmission mechanism to convert rotary motion into stable reciprocating deformation of the flexible diaphragm. The periodic concave-convex movement of the diaphragm dynamically changes the pump cavity volume. Cooperating with synchronous opening and closing of high-precision inlet and outlet one-way valves, it completes the closed-loop process of medium negative pressure suction, pressure stabilization and quantitative discharge.
The core fully enclosed isolation structure completely separates the flowing liquid from the mechanical lubrication transmission components, fundamentally eliminating oil contamination, medium pollution and core corrosion leakage risks. Benefiting from the high flexibility and corrosion resistance of the PTFE composite diaphragm, it stably conveys various particle-free corrosive and non-corrosive liquids. With 0–100% full-range stepless flow regulation, it flexibly adjusts the proportion according to process requirements, realizing long-term continuous and stable low-pressure large-flow quantitative medium delivery for general industrial fluid dosing processes.
4. Core Technical Parameters
Flow Range: 0–5800L/H, full-range stepless adjustment for large-scale mass production dosing;
Working Pressure Range: 0.3–0.5MPa, exclusive for low-pressure general working conditions without performance redundancy;
Drive Configuration: Two-phase/three-phase standard motor or explosion-proof motor optional for full-scenario adaptation;
Protection Grade: IP55, industrial dustproof and waterproof for outdoor and humid complex environments;
Control Mode: Manual precise fine adjustment + full-automatic intelligent control, 0–100% stepless regulation;
Ambient Temperature Range: -30℃～60℃, all-weather stable operation with ultra-wide temperature tolerance;
Pump Head Material: PVC, PTFE, Stainless Steel 304, Stainless Steel 316L, full media coverage;
Core Diaphragm: High-quality PTFE-rubber composite diaphragm, high corrosion resistance, high fatigue resistance and long service life;
Applicable Media: All kinds of corrosive and non-corrosive liquid fluids without solid particles.
5. Core Application Scenarios
Positioned for low-pressure, large-flow, general-purpose and high-durability mass production, the DJ-D2 series is completely differentiated from the high-pressure precision positioning of plunger pumps and high-pressure heavy-duty positioning of hydraulic diaphragm pumps, focusing on low-cost, high-stability and long-life continuous quantitative delivery for general industrial low-pressure fluid scenarios.
Municipal/Industrial Large-scale Water Treatment: Large-flow chemical dosing for water plants, municipal sewage, industrial park circulating water and reverse osmosis water purification systems, including flocculants, disinfectants, acid-base neutralizers and scale inhibitors. The IP55 protection grade adapts to outdoor open-air water treatment equipment, ensuring long-term continuous stable operation and extremely low maintenance cost, serving as the standard mainstream pump for the water treatment industry.
General Fine Chemical Low-pressure Liquid Preparation: Quantitative proportioning and delivery of conventional chemical reactor additives, acid-base regulators, solvent stock solutions and low-corrosion process liquids. It features pollution-free medium delivery and uniform stable flow, adapting to small and medium-sized chemical batch production and formula commissioning with higher cost performance than high-pressure heavy-duty models.
Power Environmental Protection Desulfurization & Denitrification: Quantitative dosing of flue gas desulfurization and denitrification chemicals and circulating water corrosion inhibitors for power plants and heating stations. It adapts to dusty and humid workshop environments, resists temperature fluctuations, and the composite diaphragm withstands chemical medium corrosion, meeting the long-term uninterrupted operation requirements of environmental protection equipment.
Food, Pharmaceutical & Light Industry Clean Production: Quantitative delivery of food and beverage ingredients, pharmaceutical sterile additives and high-purity light industry solutions. The optional 316L stainless steel pump head and fully isolated pollution-free structure eliminate secondary medium pollution, complying with clean production standards for low-pressure large-flow clean liquid preparation scenarios.
Explosion-proof Light Industry & General Chemical Working Conditions: It adapts to the delivery of low-pressure flammable, explosive and volatile particle-free media. The optional explosion-proof motor meets workshop explosion-proof specifications. The mechanical structure produces no friction spark or medium leakage, ensuring safe and stable operation for light industry explosion-proof mass production.
New Energy & New Material Pilot and Mass Production: Quantitative delivery of low-pressure high-purity reagents, corrosive process solutions and proportioned slurries. The large flow adapts to batch production, and stepless regulation meets process commissioning requirements. Multiple pump head materials adapt to complex media with high working condition flexibility.
6. Product Summary
With the core strengths of 5800L/h large-flow low-pressure exclusive adaptation, PTFE composite long-life diaphragm, IP55 high-protection all-weather operation, fully isolated pollution-free medium delivery, four-material full-media compatibility, dual-mode stepless flexible regulation and minimal low-maintenance high cost performance, the DJ-D2 mechanical diaphragm metering pump accurately occupies the segmented field of industrial low-pressure large-flow general metering. It solves the industry pain points of redundant cost of high-pressure models, vulnerable diaphragms of ordinary metering pumps, poor environmental adaptability and easy medium pollution. Featuring stable durability, wide adaptability, convenient maintenance and outstanding cost performance, it is the preferred general-purpose metering equipment for low-pressure large-flow quantitative delivery in water treatment, general chemical industry, power environmental protection, light industry and pharmaceutical industries.