Cheonsei Industrial Metering Equipment and Systems

Engineering selection of Cheonsei chemical pump systems

For continuous chemical dosing in water treatment and chemical manufacturing, select Cheonsei KM, KD motor-driven pumps or SP-C solenoid units. Precise micrometer stroke adjustment and 4–20 mA remote pacing ensure adaptive chemical feed proportional to fluctuating process flow rates.

When continuous laminar dosing without pressure surges is required, deploy the PKD smooth flow series. The patented constant velocity cam mechanism maintains uninterrupted forward chemical velocity, eliminating the need for bulky external pulsation dampeners.

For drum emptying and chemical decanting operations involving aggressive acids and bases, specify Cheonsei DR drum pumps with PVDF or SUS316 immersion tubes, matched with electric motors or explosion-proof air drive options.

Engineering comparison and drive kinematics of Cheonsei pumps

Selecting the proper chemical dosing pump architecture requires comprehensive analysis of drive kinematics, liquid rheology, and hydraulic head.

Cheonsei KM and KD mechanical diaphragm pumps utilize robust worm-gear transmissions and eccentric linkages that directly actuate the center of the diaphragm, ensuring repeatable stroke volume despite discharge pressure swings.

In contrast, the smooth flow PKD series incorporates a patented constant velocity cam mechanism driving dual opposed or parallel displacement heads.

The cam profile is machined to match deceleration on one stroke with identical acceleration on the alternate stroke, producing an uninterrupted laminar chemical stream that eliminates pipeline vibration without bulky gas-charged pulsation dampeners.

For high-pressure industrial injection processes, the KH series hydraulic diaphragm pump provides unmatched durability.

An internal hydraulic oil reservoir fully balances fluid pressure across the entire rear surface of the PTFE diaphragm, eliminating mechanical shear stresses and extending operational life beyond 15,000 continuous operating hours.

Integrating Cheonsei dosing equipment into plant-wide PLC automation networks is facilitated by the SP-C digital solenoid controller and Mestar monitoring instruments.

The isolated 4–20 mA current loop input enables dynamic flow pacing proportional to incoming water flowmeter telemetry or closed-loop pH neutralization feedback.

When constructing dosing line manifolds, always install Cheonsei BPV back pressure valves downstream of the injection point.

Back pressure valves prevent siphon phenomena caused by positive suction head in elevated chemical storage tanks, guaranteeing instant positive line shutoff upon pump motor de-energization.

Receiving inspection and storage protocols for metering equipment

Upon delivery of Cheonsei metering units and replacement assemblies at the plant warehouse, execute a formal incoming inspection.

Verify that nameplate data matches purchase specifications, and inspect polymer and stainless steel connections for shipping damage, impact fractures, or distorted thread profiles.

Verify check valve cleanliness and unrestricted internal mobility. Lightly shaking the valve cartridge should produce an audible movement of the internal ceramic ball.

Any packing dust, metallic chips, or abrasive contaminants must be thoroughly flushed with dry compressed air before chemical commissioning.

If equipment is slated for extended staging prior to site installation, confirm that drive gearboxes contain appropriate factory synthetic lubricant.

Polymer pump heads fabricated from PVC or PVDF must remain sealed with protective transit plugs to protect sealing faces from particulate contamination.

Spare molded PTFE diaphragms, elastomeric O-rings, and FKM valve seats should be stored in their original sealed polybags in a climate-controlled room between +10 and +25 °C, shielded from direct sunlight exposure, ozone generators, and excessive ambient humidity.

Log serial numbers, receiving dates, and inspection reports into the facility computerized maintenance management system (CMMS) to establish reliable baselines for upcoming preventive maintenance overhauls.

Preventive maintenance, troubleshooting and spare parts overhaul

Routine preventive maintenance on Cheonsei dosing pumps should occur every 3,000 to 4,000 operational hours or semi-annually under continuous chemical feed conditions. Primary inspection protocols evaluate flow delivery stability, casing joint seal integrity, and gearbox oil clarity.

A decrease in volumetric output while motor stroke frequency remains nominal typically indicates check valve fouling or seat degradation.

Chemical crystallization, particulate deposition, or ceramic ball wear compromises seating geometry, resulting in internal backflow slippage during discharge strokes.

Visual evidence of liquid weepage from the inspection drain port located between the drive bracket and the liquid head alerts technicians to diaphragm micro-cracking. The pump must be de-energized immediately to prevent corrosive chemical ingress into the drive gearbox and bearings.

For Cheonsei DR drum pumps, periodically inspect shaft guide bushings and the bottom impeller. Pumping chemical solutions containing suspended abrasives accelerates guide bushing wear, leading to radial shaft vibration and premature mechanical seal degradation.

When executing major overhauls, install factory-original Cheonsei service kits containing the PTFE diaphragm, valve seats, ceramic balls, guide collars, and O-ring sets to restore original volumetric accuracy and industrial operating reliability.