China Pneumatic Liquid CO2 Pump Pneumatic Driven Liquid Pump Pneumatic Liquid CO2 Refilling Pump

Popular Usun Model :AH-CO2 160mm driven middle size pneumatic driven
liquid CO2 pump for supercritical extraction machine
General Information for Air driven liquid pumps

USUNair driven liquidpumpsare ratio devices that utilize low pressure compressed

airdriving a larger diameter piston (area x pressure) which is linearly connected to a smaller

hydraulicpiston/plunger. Using this ratio principal, a higher hydraulic pressure can be generated.

UsunPump model numbers reflect the pumps nominal pressure ratio, while the technical data

indicates exact ratios. The outlet stall pressure is easy to set by adjusting the air drive pressure

through a simple air pressure regulator.

By multiplying the pressure ratio by the available shop

airpressure, the nominal liquid pressure can be calculated.

Exmple ( Pump Model:AH40liquid pump)

Air drive piston area (160mm Ø)

Hydraulic plunger area ( 25mm Ø)

Actual ratio = 40:1

1. AIR DRIVE SECTION

The air drive section consists of a light weight piston complete with seals running inside an

aluminumbarrel. The diameter of the air piston is 80mm. When compressed air is supplied to

the pump the airpushes the air piston down on a compression stroke

( forces fluid out of the liquid end).

Under thecontrol of pilot pins (poppet valve) triggered at each end of the stroke

2. HYDRAULIC SECTION (WettedEnd)

The hydraulic section of an air driven liquid pump consists of 4 main pieces, the hydraulic body,

thepiston/plunger, the check valves and the main high pressure seal. The hydraulic

piston/plunger isdirectly linked to the air piston and it is housed inside the hydraulic body and

its movement up anddown creates the liquid flow into and out of the pump through the check

valves. The check valves arespring loaded and on the suction stroke the inlet check valve

opens to the maximum allowing fluid intothe hydraulic body and on the compression stroke the

inlet check valve closes and the dischargecheck valve opens forcing the pumped fluid into the

process. The main high pressure seal is located within the hydraulic body and the piston/plunger seals

againstthis during operation.There are different materials and designs of high pressure seals

depending onthe fluid being pumped and the maximum pressures of the pump, however the

standard seals aresuitable for both water and hydraulic fluid use.

USUNair driven liquid pumps are self-priming, However, high ratio pumps are more difficult to

Primeand may require bleeding. In general, it is not recommended to use an air- line lubricator.

USUN air driven liquid pumps cycle automaticallyas the outlet pressure increases the

resistancealso increases and the cycle rate decreases until the pump stops automatically

when the outputpressure forces are equal. This is referred to as the stall condition.

The pump will restart with a slightdrop in the outlet pressure or an increase in the air drive

pressure.Pump performance can be affected by a number of conditions, such as freezing of the

exhaust muffleror pilot valves (which is caused by moisture in air lines), inadequate inlet air-line

sizes and dirty filers.When operating the pumps on a continuous basis, we recommend you use

a maximum cycle rate of50~60 cycles per minute.

This will both increase service intervals and assist in preventing ice forming

at the exhaust. An air supply dryer will also assist in reducing icing up.

To obtain best overall performance, it is recommended not to reduce the indicated port sizes

andconsult We for flow conditions not shown in charts.Typical applications for air driven Liquid CO2 pumpsKey features

One model available in8 ratios

Compatibility with a variety of liquids

Safe pneumatic operation

Aluminum bodies and wetted materials of carbon steel or stainless steel

Rugged,compact,reliable and easy maintenance proven design

High quality seals, long service life available

No need for air line lubrication

Wide application with large range of pressure ratioMain technical data
Typical technical data for pneumatic driven liquid pumps

AH Middle size liquid pumpHardware Accessories Technical data base on 7 bar air driven pressure 1.0 M3/min air consumptionAir driven pressure base on 7BarModelPiston/Rod diameterø(mm)Displacement per stroke(mL)Liquid INLiquid OUTMax pressure Bar base on 8.3BarLiquid outlet(Bar) 1Bar=0.1Mpa=1.019Kg/cm²0204070100Industrial Adhesive Products 150200300400500600700900120017002350Flow rate(L/min)AH02100471.24NPT3/4"NPT3/4"20.756.550AH0480402.12NPT3/4"NPT3/4"33.248.2516.08AH0763249.38NPT3/4"NPT3/4"49.629.939.984.99AH1050157.08NPT3/4"NPT3/4"8318.8512.57Industrial Customized Service 9.420AH1640100.53NPT3/4"NPT3/4"132.812.069.057.046.034.02AH203576.97NPT3/4"NPT3/4"1669.247.76.936.165.390AH283056.55NPT1/2"NPT1/2"232.46.795.665.094.523.963.390AH402539.27NPT1/2"NPT1/2"3324.713.933.533.142.752.361.960AH642025.13NPT3/8"NPT3/8"4983.022.512.262.011.761.511.261.010.75AH801820.36NPT3/8"NPT3/8"6642.442.041.831.631.431.221.020.810.710.61AH1001616.08NPT3/8"NPT3/8"8301.931.771.611.531.371.210.960.80.640.560.480AH1301412.32NPT3/8"NPT3/8"10791.481.421.361.231.110.990.860.740.620.490.430.370.12AH170126.79NPT3/8"NPT3/8"14110.810.780.750.710.680.610.540.480.410.340.270.240.20.07AH240104.71NPT3/8"NPT1/4"19920.570.540.520.490.470.420.380.330.280.240.190.160.140.120.09AH30093.82NPT1/4"*HF424900.460.440.440.420.40.380.340.310.270Machinery for Garment, Shoes & Accessories .230.190.170.150.170.1AH40083.02NPT1/4"*HF433200.360.350.350.330.320.30.270.240.210.180.150.140.120.110.110.08

Remark 1) Maxium outlet pressure are at an air driven pressure of 8 bar or 116 PSI ,for long life using

of such pump ,we suggest that air driven pressure should be not more than 8 Bar
Typical diagram of such air driven liquid pumps

Product Applications

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