Usun Model: AH40-CO2 Pneumatic Driven Liquid CO2 Refilling Pump for Supercritical Extraction Machine

Product Description

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
USUN air driven liquid pumps are ratio devices that utilize low pressure compressed

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

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

Usun Pump 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

air pressure, the nominal liquid pressure can be calculated.

Exmple ( Pump Model: AH40 liquid pump)

Air drive piston area ( 160mm Ø)

Hydraulic plunger area ( 25 mm 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

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

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

( forces fluid out of the liquid end).

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

2. HYDRAULIC SECTION (Wetted End)

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

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

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

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

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

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

inlet check valve closes and the discharge check 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

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

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

standard seals are suitable for both water and hydraulic fluid use.

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

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

USUN air driven liquid pumps cycle automatically as the outlet pressure increases the

resistance also increases and the cycle rate decreases until the pump stops automatically

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

The pump will restart with a slight drop 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 muffler or 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 of 50~60 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

and consult We for flow conditions not shown in charts.
Typical applications for air driven Liquid CO2 pumps
Key features
One model available in 8 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 ratio
Main technical data
Typical technical data for pneumatic driven liquid pumps

AH Middle size liquid pump
Technical data Base on 7 bar air driven pressure 1.0 M3/min air consumption
Air driven pressure base on 7Bar
Model	Piston/Rod diameterø(mm)	Displacement per stroke(mL)	Liquid IN	Liquid OUT	Max pressure Bar base on 8.3Bar	Liquid outlet (Bar) 1Bar=0.1Mpa=1.019Kg/cm²
						0	20	40	70	100	150	200	300	400	500	600	700	900	1200	1700	2350
						Flow rate (L/min)
AH02	100	471.24	NPT3/4"	NPT3/4"	20.7	56.55	0
AH04	80	402.12	NPT3/4"	NPT3/4"	33.2	48.25	16.08
AH07	63	249.38	NPT3/4"	NPT3/4"	49.6	29.93	9.98	4.99
AH10	50	157.08	NPT3/4"	NPT3/4"	83	18.85	12.57	9.42	0
AH16	40	100.53	NPT3/4"	NPT3/4"	132.8	12.06	9.05	7.04	6.03	4.02
AH20	35	76.97	NPT3/4"	NPT3/4"	166	9.24	7.7	6.93	6.16	5.39	0
AH28	30	56.55	NPT1/2"	NPT1/2"	232.4	6.79	5.66	5.09	4.52	3.96	3.39	0
AH40	25	39.27	NPT1/2"	NPT1/2"	332	4.71	3.93	3.53	3.14	2.75	2.36	1.96	0
AH64	20	25.13	NPT3/8"	NPT3/8"	498	3.02	2.51	2.26	2.01	1.76	1.51	1.26	1.01	0.75
AH80	18	20.36	NPT3/8"	NPT3/8"	664	2.44	2.04	1.83	1.63	1.43	1.22	1.02	0.81	0.71	0.61
AH100	16	16.08	NPT3/8"	NPT3/8"	830	1.93	1.77	1.61	1.53	1.37	1.21	0.96	0.8	0.64	0.56	0.48	0
AH130	14	12.32	NPT3/8"	NPT3/8"	1079	1.48	1.42	1.36	1.23	1.11	0.99	0.86	0.74	0.62	0.49	0.43	0.37	0.12
AH170	12	6.79	NPT3/8"	NPT3/8"	1411	0.81	0.78	0.75	0.71	0.68	0.61	0.54	0.48	0.41	0.34	0.27	0.24	0.2	0.07
AH240	10	4.71	NPT3/8"	NPT1/4"	1992	0.57	0.54	0.52	0.49	0.47	0.42	0.38	0.33	0.28	0.24	0.19	0.16	0.14	0.12	0.09
AH300	9	3.82	NPT1/4"	*HF4	2490	0.46	0.44	0.44	0.42	0.4	0.38	0.34	0.31	0.27	0.23	0.19	0.17	0.15	0.17	0.1
AH400	8	3.02	NPT1/4"	*HF4	3320	0.36	0.35	0.35	0.33	0.32	0.3	0.27	0.24	0.21	0.18	0.15	0.14	0.12	0.11	0.11	0.08

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

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