Keypack Intelligent Liqui/Pastes Metering Pump is a pneumatic-driven volumetric dosing system engineered for high-precision fluid transfer in industrial manufacturing. It delivers ±1% metering accuracy across viscosities from 1 to 50,000 cP, ensuring consistent formulation quality in chemical processing, pharmaceutical production, and food manufacturing. Designed for explosion-proof operation in hazardous classified areas, this air-powered metering pump handles corrosive acids, flammable solvents, and thick pastes in demanding production environments requiring reliable liquid weighing and controlled dispensing.
Product Overview
The Keypack Intelligent Liqui/Pastes Metering Pump operates through a pneumatic mechanism where compressed air drives a precision-engineered piston in reciprocating motion within a sealed cylinder chamber. This piston movement actuates a drive gear system that meshes with driven gears, creating controlled volumetric displacement within the pump chamber. The positive displacement action enables precise liquid suction and discharge cycles, achieving repeatable metered transfer with exceptional accuracy for both low-viscosity liquids and high-viscosity pastes.
The pump architecture consists of three integrated subsystems: a pneumatic motor assembly providing motive force through compressed air actuation, a precision pump head manufactured from chemical-resistant materials responsible for fluid suction and discharge operations, and a pneumatic control valve regulating compressed air intake and exhaust to control pump stroke rate and flow volume. This modular design ensures reliable industrial weighing and volumetric metering performance across demanding fluid handling applications.
Unlike electric metering pumps that require electrical infrastructure and pose ignition risks in volatile atmospheres, this air-driven design eliminates electrical components entirely, providing intrinsic safety for flammable liquid transfer in petroleum refineries, solvent handling facilities, and chemical processing plants with ATEX Zone 1 and Class I Division 1 hazardous location classifications. The pneumatic operation delivers energy-efficient fluid metering without electrical consumption, supporting sustainable manufacturing while maintaining consistent high-precision metering accuracy across extended production runs.
Technical Specifications
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Flow Rate Range: 0.1 to 50 L/min (adjustable via stroke control)
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Metering Accuracy: ±1% of set volume (±0.5% with calibration)
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Viscosity Range: 1 to 50,000 cP (liquids and pastes)
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Operating Pressure: 4-7 bar (58-102 psi) compressed air supply
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Air Consumption: 0.3-1.2 m³/min (dependent on stroke rate)
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Discharge Pressure: Up to 10 bar (145 psi)
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Temperature Range: -10°C to 80°C (14°F to 176°F)
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Wetted Materials: 316L stainless steel, PTFE, PVDF (chemical-resistant options)
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Connection Size: 1/2" to 2" NPT/BSP threaded or tri-clamp sanitary fittings
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Dimensions: 450mm × 280mm × 380mm (L × W × H)
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Weight: 18-25 kg (dependent on material configuration)
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Power Source: Compressed air (pneumatic), no electrical power required
Key Features and Machine Characteristics
1. Explosion-Proof Design for Hazardous Environments
The pneumatic-driven architecture eliminates all electrical ignition sources, providing intrinsic safety for flammable liquid metering in chemical processing plants handling volatile solvents, petroleum refineries transferring gasoline and diesel fuels, and paint manufacturing facilities dosing flammable thinners. Certified for ATEX Zone 1, IECEx, and Class I Division 1 hazardous location installations, this explosion-proof metering pump protects personnel and equipment in volatile atmospheres where electric pumps pose unacceptable ignition risks. The air-powered operation ensures safe chemical dosing in environments with explosive vapor concentrations.
2. High-Precision Volumetric Metering Accuracy
The positive displacement mechanism delivers ±1% metering accuracy with exceptional repeatability across production batches, ensuring consistent formulation quality in pharmaceutical API dosing, chemical batch processing, and food ingredient metering applications. Adjustable stroke length and frequency control enable precise flow rate optimization from 0.1 to 50 L/min, supporting both micro-dosing applications requiring milliliter-level precision and high-volume transfer operations. This precision liquid metering capability reduces material waste, improves product quality consistency, and meets stringent pharmaceutical GMP and food safety HACCP requirements.
3. Wide Viscosity Range for Liquids and Pastes
Engineered to handle fluids from water-thin liquids at 1 cP to thick pastes and creams up to 50,000 cP, this versatile metering pump transfers low-viscosity solvents, medium-viscosity oils and syrups, and high-viscosity adhesives, creams, and paste formulations without flow rate degradation. The robust gear-driven displacement mechanism maintains consistent volumetric metering accuracy regardless of viscosity variations, making it ideal for food processing facilities metering honey and chocolate syrup, cosmetic manufacturers dosing creams and lotions, and adhesive production lines transferring thick bonding compounds and sealants.
4. Chemical-Resistant Construction and Material Compatibility
Wetted components manufactured from 316L stainless steel, PTFE (Teflon), and PVDF provide exceptional chemical resistance for corrosive acid metering, caustic alkali transfer, and aggressive solvent dosing in chemical processing operations. Material options accommodate hydrochloric acid, sulfuric acid, sodium hydroxide, organic solvents, and specialty chemicals that would corrode conventional pump materials, ensuring long service life in demanding chemical manufacturing and pharmaceutical production environments. The chemical-resistant design minimizes maintenance costs and extends equipment lifespan in corrosive fluid handling applications.
5. Simple Maintenance and Modular Design
The straightforward mechanical architecture minimizes complexity, enabling rapid maintenance procedures and reducing mean time to repair (MTTR) in production environments. Modular pump head design allows quick seal replacement, diaphragm changes, and component servicing without complete pump removal, minimizing production downtime. Accessible wear components and standardized spare parts inventory reduce total cost of ownership for industrial dosing systems and volumetric metering installations. Maintenance-friendly design supports continuous operation in 24/7 manufacturing facilities.
6. Energy-Efficient Pneumatic Operation
Compressed air actuation eliminates electrical energy consumption, reducing operational costs and supporting sustainable manufacturing initiatives in eco-friendly production facilities. The pneumatic operation produces no electrical waste heat, requires no motor cooling systems, and operates with lower noise levels compared to electric pump installations, contributing to improved working environments in food processing plants, pharmaceutical clean rooms, and chemical manufacturing facilities. Air-powered metering reduces carbon footprint and supports green manufacturing certifications.
Application Areas
Chemical Processing and Petrochemical Manufacturing
Chemical plants utilize this liquid metering pump for precise acid dosing in neutralization reactors, solvent metering in chemical synthesis processes, and catalyst injection in polymerization operations. Typical applications include sulfuric acid metering for pH control in wastewater treatment, hydrochloric acid dosing in metal pickling lines, organic solvent transfer in pharmaceutical intermediate production, and specialty chemical metering in coating formulation. The explosion-proof design ensures safe operation when handling flammable solvents including acetone, toluene, xylene, and methanol in petrochemical refineries and chemical manufacturing facilities with hazardous area classifications.
Pharmaceutical and Nutraceutical Production
Pharmaceutical manufacturers employ this volumetric metering pump for active pharmaceutical ingredient (API) dosing in tablet coating operations, excipient metering in suspension formulation, and sterile liquid transfer in aseptic filling lines. Sanitary design options with 3A-compliant tri-clamp fittings and FDA-approved wetted materials ensure GMP compliance for pharmaceutical liquid metering in antibiotic production, vaccine manufacturing, and injectable drug formulation. Nutraceutical facilities use the pump for vitamin solution dosing, herbal extract metering, and supplement liquid filling operations requiring high-precision fluid metering accuracy and batch-to-batch consistency.
Food and Beverage Processing
Food processing plants deploy these pumps for flavor concentrate metering in beverage production, color additive dosing in confectionery manufacturing, and enzyme solution transfer in dairy processing operations. Specific applications include chocolate syrup metering for ice cream production, fruit concentrate dosing in juice blending lines, liquid sweetener transfer in bakery operations, and sauce ingredient metering in condiment manufacturing. The sanitary stainless steel construction and CIP-compatible design support food safety compliance in facilities requiring HACCP certification and FDA food-grade material standards for liquid food ingredient handling.
Coatings, Paints, and Adhesives Manufacturing
Paint manufacturers utilize this high-precision metering pump for pigment dispersion metering in color formulation, resin dosing in coating production, and hardener injection in two-component epoxy systems. Applications include automotive paint tinting operations requiring precise colorant metering, industrial coating formulation with viscous resins up to 30,000 cP, and adhesive production lines metering polyurethane components and silicone sealants. The pump handles high-viscosity pastes and thick compounds that would clog conventional metering systems, ensuring consistent formulation quality in specialty coating and adhesive manufacturing operations.
Cosmetics and Personal Care Product Manufacturing
Cosmetic manufacturers employ this pump for cream base metering in lotion production, fragrance oil dosing in perfume formulation, and active ingredient transfer in skincare product manufacturing. Applications include shampoo base metering for hair care production, moisturizer cream dosing in cosmetic filling lines, and essential oil metering in aromatherapy product formulation. The gentle pumping action prevents emulsion breakdown and maintains product integrity for sensitive cosmetic formulations requiring careful handling during industrial weighing and filling operations in beauty product manufacturing facilities.
Water Treatment and Environmental Applications
Municipal water treatment facilities use this pneumatic metering pump for chlorine solution dosing in disinfection systems, polymer metering in coagulation processes, and pH adjustment chemical transfer in purification operations. Industrial wastewater treatment plants employ the pump for flocculant dosing, neutralization chemical metering, and odor control agent injection. The chemical-resistant construction handles corrosive treatment chemicals including sodium hypochlorite, ferric chloride, aluminum sulfate, and caustic soda in drinking water treatment plants, industrial effluent processing facilities, and environmental remediation operations.
Petroleum Refining and Fuel Blending
Refineries deploy these explosion-proof pumps for additive injection in gasoline blending operations, lubricity improver metering in diesel fuel production, and octane booster dosing in fuel formulation processes. The intrinsic safety of air-powered operation eliminates ignition risks when metering flammable additives, volatile fuel components, and combustible petroleum products in hazardous classified areas. Applications include fuel dye injection for tax compliance, detergent additive metering for fuel quality enhancement, and anti-knock compound dosing in aviation fuel production at petroleum refineries and fuel terminal facilities.
Agricultural Chemical and Fertilizer Production
Agrochemical manufacturers utilize this pump for pesticide concentrate metering in formulation operations, herbicide active ingredient dosing in production lines, and liquid fertilizer component transfer in blending systems. Applications include nitrogen solution metering for liquid fertilizer production, micronutrient dosing in specialty fertilizer formulation, and surfactant metering in pesticide emulsion manufacturing. The chemical-resistant materials handle corrosive agricultural chemicals and concentrated fertilizer solutions in crop protection product manufacturing and agricultural input production facilities.
Optional Configurations and Customization
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Material Options: 316L stainless steel, Hastelloy C, titanium for extreme chemical resistance
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Seal Materials: PTFE, Viton, EPDM, Kalrez for specific chemical compatibility
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Connection Types: NPT threaded, BSP threaded, tri-clamp sanitary, flanged connections
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Flow Control: Manual stroke adjustment, pneumatic flow controller, automated PLC integration
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Monitoring Systems: Flow meters, pressure sensors, stroke counters for process control
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Heating/Cooling Jackets: For temperature-sensitive fluids and viscosity control
Delivery and Support
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Lead Time: Standard configurations ship within 2-4 weeks; custom builds 4-8 weeks
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Installation and Commissioning: On-site installation support and system integration available
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Training: Operator training and maintenance procedures documentation included
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Spare Parts: Comprehensive spare parts kits and wear component inventory available
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Warranty: 12-month warranty on materials and workmanship; extended warranty options available
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Technical Support: Remote troubleshooting and on-site service support worldwide
