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  • Nikkiso Metering Pumps

Nikkiso Metering Pumps

Industries: oil refining and petrochemicals, chemicals, semiconductor, power plant, steel


NIKKISO METERING PUMPS are designed to operate under toughest applications for continuous operation. With the precise handling, stoke length is adjustable from 0~100% while the pump is running or stopped. NIKKISO METERING PUMPS comform to American Petrochemical Institute API-675 2nd edition design requirement.

.Steady state accuracy within +0.5% under 10:1 turndown ratio
.Repeated accuracy within 3% under 10:1 turndown ratio
.Liner accuracy within 3% under 10:1 turndown ratio


.Unique X crank system: X crank system was developed to achieve high piston force, high rotating speed, precise stroke setting and durability at the highest level. Single solid piece X crank eliminates play and vulnerable pins from the crankshaft.

.Auto air-vent and relief valve:Constant amount of hydraulic oil is exhausted at every discharge stroke from air vent valve to bleed entrained air. Thus, the hydraulic chamber is always maintained to be air entrapment free for high accuracy and performance stability.

.Internal relief valve:To ensure no diaphragm crack due to high internal pressure of pump under abnormal operation.

.Vacuum operation:Maintain stable operation for -0.3kgf/cm2G vacuum condition.

Pump Capacity-Pressure Charts


Pulseless Series

Incorporating specially designed cam and double pistons. With no need of pulsation dampener, pulsation of flow and pressure can be dramatically decreased to achieve steady flow with high accuracy.

MX Series

The MX series pumps deliver optimum performance with various uses of injecting chemicals such as coagulant, assistant, neutralization reagent, and sterilizer.

.Steady State Accuracy: within ±0.5%

.Diaphragm condition Monitoring available

.Discharge volume can be adjusted by automatic control

.Motor can be installed both vertically and horizontally

Nikkiso 定量泵浦 單膜片型( Single Diaphragm Type )
Single Diaphragm Type

Versatile for various application including slurry handling due to improved hydraulic design, which eliminates contour plate.

Nikkiso 定量泵浦 金屬膜片型( Metal Diaphragm)
Metal Diaphragm

Suited for high pressure and high temperature service beyond the service range of PTFE diaphragm. Minimum curvature prevents excessive metallic diaphragm flexure, and provides extended diaphragm life.

Nikkiso 定量泵浦 雙膜片型 (Double Diaphragm with Rupture Indicator)
Double Diaphragm with Rupture Indicator

Suited for processes where hazardous, toxic or precious fluids are handled or process contamination by hydraulic oil is not permitted. Rupture indication by pressure gauge, pressure switch or combination for alarm and shutdown is available.

Nikkiso 定量泵浦柱塞型( Packed Plunger Type )
Packed Plunger Type

Suitable for a broad range of high temperature, high pressure, non-toxic, and non-corrosive liquids.

Nikkiso 定量泵浦 高發泡型
Sodium Hypochlorite Series

Suitable for Gas-forming liquid such as Sodium Hypochlorite and Hydrogen Peroxide. To prevent unstable operation owing to these gases, the suction port is located in the upper position and the vent connection is furnished at the top of the pump chamber.

Accessories for Nikkiso Metering Pumps

We offer all kinds of accessories according to each operating requirement

nikkiso metering pump parts

NIikkiso Electric Servo Unit

By remote input signal 4~20mA, pump stroke length can be adjustable to meet the process operating flow (air servo unit is an option to select)

Nikkiso 日機裝電動伺服機構
Relief valve

Release abnormal pressure generated inside the system to secure piping safety.

nikkiso metering pump Relief valve
Back Pressure Valve​​

Set up proper system back pressure to ensure stable pump operation.

nikkiso metering pump Back Pressure Valve​​

Absorb pump flow and pressure pulsation.

nikkiso metering pump Accumulator
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