Usun Model: at Hose or Pipes or Valve Air Driven Liquid Pressure Testing Pump

Product Description

Popular Usun Model :AT type hose or pipes or valve air driven liquid
pressure testing pump
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: AT644 liquid pump)

Air drive piston area ( 160mm Ø)

Hydraulic plunger area ( 20 mm Ø)

Actual ratio = 64:1

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
Typical applications for pneumatic driven water testing pump
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 water pump

AT Serial Air liquid pump
Technical data Base on air driven at 7Bar , air consumption is around 0.9M3 per min
Base on air driven pressure at 7Bar
Model	Piston/Rod diameter ø(mm)	Displacement per stroke (mL)	Liquid IN	Liquid OUT	Maximum outlet pressyre Bar@at 8.3Bar	Liquid Outlet pressure (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 (L/min)
AT10	50	294.52	NPT3/4''	NPT3/4"	83	35.34	26.51	20.62	17.67	11.78
AT16	40	188.5	NPT3/4"	NPT3/4"	132.8	22.62	16.97	13.2	11.31	7.54
AT20	35	144.32	NPT3/4"	NPT3/4"	166	17.32	14.43	12.99	11.55	10.1	0
AT28	30	106.03	NPT1/2"	NPT1/2"	232.4	12.72	10.6	9.54	8.48	7.42	6.36	0
AT40	25	73.63	NPT1/2"	NPT1/2"	332	8.84	7.36	6.63	5.89	5.15	4.42	3.68	0
AT64	20	47.12	NPT3/8"	NPT3/8"	498	5.65	4.71	4.24	3.77	3.3	2.83	2.36	1.88	1.41
AT80	18	38.17	NPT3/8"	NPT3/8"	664	4.58	3.82	3.44	3.05	2.67	2.29	1.91	1.53	1.34	1.15
AT100	16	30.16	NPT3/8"	NPT3/8"	830	3.62	3.32	3.02	2.87	2.56	2.26	1.81	1.51	1.21	1.06	0.9	0
AT130	14	23.09	NPT3/8"	NPT3/8"	1079	2.77	2.66	2.54	2.31	2.08	1.85	1.62	1.39	1.15	0.92	0.81	0.69	0.23
AT170	12	12.44	NPT3/8"	NPT3/8"	1411	1.49	1.43	1.37	1.31	1.24	1.12	1	0.87	0.75	0.62	0.5	0.44	0.37	0.12
AT240	10	8.64	NPT3/8"	*HF4	1992	1.04	0.99	0.95	0.91	0.86	0.78	0.69	0.6	0.52	0.43	0.35	0.3	0.26	0.22	0.17
AT300	9	7.32	NPT1/4"	*HF4	2490	0.88	0.84	0.84	0.81	0.77	0.73	0.66	0.59	0.51	0.44	0.37	0.33	0.29	0.33	0.18
AT400	8	5.53	NPT1/4"	*HF4	3320	0.66	0.64	0.64	0.61	0.58	0.55	0.5	0.44	0.39	0.33	0.28	0.25	0.22	0.21	0.19	0.14

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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