China Pneumatic Refrigerant Pump Pneumatic Refrigerant Recovery Pump Refrigerant Recovery Pump

Usunair driven gas boosterpumpsare 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 gas pressure can be calculated.

Example ( Pump Model:GB25 Gas boosterpump)

Air drive piston area (160mm Ø)

Hydraulic plunger area (32mm Ø)

Actual ratio =25:1

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 is160mm. When compressed air is supplied to

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

(forces as out of the gas end).

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

2. GAS DRIVEN SECTION

ThegassectionofaUSUNairdrivengasboosterconsisitof4mainpieces

,thegasbarrel,thepistonthecheckvalvesandthemainhighpressureseals.

Thegaspistonisdirectlylinkedtotheairpistonanditishousedinsidethegasbarrel

anditsmovementsupanddowncreatesthegasflowintoandoutoftheboosterthrough

thecheckvalves.Thecheckvalvesarepsringloadedandonthesuctionstroke.the inlet check valve

opens to the maximum allowing gas into the gas barrel and on the compression stroke

the inlet check valve closes the discharge check valve opens forcing the pumped gas

into the process .Themainhighpressuresealsislocatedonthegaspistonandtheysealagaist
thegasbarrelduringoperation. and the maximum pressures of the pump ,however the

standard PTFE seals are suitable for both the vast majority of gases encountered.

Othermaterialsofconstructioncanbesuppliedtomeetmoreaggresiveservices

.Thestandardserialsofboosterarenotsuitableforundergroundcoalmineapplications.

USUNDOMixing Equipment Manufacturemodelsof air driven gas boostersthat arenotsuitable for undergroundcoal mine applications .

USUN Air driven gas boosters cycle automatically as the outlet pressure increass the

resistance alsoincreasesandthecycleratedecreasesuntilthepumpstopsautomatically

whentheoutputpressureforcesareequal.Thisisreferedtoasthestallcondition.

Thepumpwillrestartwithaslightdropintheoutlletpressureoranincreaseinthe airdrivenpressure
Boosterperformancecanbeaffectedbyanumberofconditions,

suchasfreezingoftheexhaustmufflerorpilotvalves(Whichiscausedbymoisturein

airlines),inadequateinletairlinesizesanddirtyfilers.When operatingtheboosters

onacontunuousbasis,werecommendyouuseamaximumcyclerateof50-60cyclesperminute.

Thiswillbothincreaseserviceintervalsandassistinpreventingiceformingattheexhaust.

Anairsupplydryerwillalsoassistinreducingicingup .

USUNGasboostershavea120mmstrokethusreducingcycleratesatanygivenflow

andpressureascomparedwithmostotherbrands.Thislowerrepsectivecyclerateres

ultsinareductioninfreeze-up condition.

Toabtainbestoverallperformance,donotreducetheindicatedportsizeandconsult

USUNforflowconditionsnotshownincharts Model selection for gas booster

ItisveryimportanttorememberElectrical Control System thattheperformanceofanyairdrivendeviceisverydependentontheairsupplyconditions.Restrictionsintheairsupplycanbecausedbyusingatoosmallaircompressororairlines.TheFLOWCHARTSSHOWNinthetechnicaldatashPneumatic Tools eetarebasedongoodconditions .sopleasedonot"designtotheline"allowforlossesandinefficiencies

The next question is wheather you want the booster to stall when an outlet pressure is reached

If so ,a simple airline pressure regulator will suffice ,but remember Circuit Board the flow drops off dramatically as the

booster reaches a stall condition .

IfyouneedthepumptostopataIndustrial Adhesive Products certainpressure,priortostall,thenanairpilorswitchesneedstobeinstalled.

Key features

1. Realiable ,Easy to Maintain ,compact and robust

2. No heat,flame or spark risk

3. Infinitely variable cycling speed and output

4. Air driven Models do not require electrical connection ,easy to apply automatic controls

5. No limit or adverse affect to contineous stop/start applications

6.Seals system designed for long working life,No airline lubricated required

7.Built-in coupling system (Most models) and suitable for most gases boostingMain technical data Typical technical data for air driven gas booster pump

Model

Pressure ratio

Maximum Outlet pressure PO(Bar)

Outlet pressure formula PO

Air driven port size

Inlet port size

Outlet porst size

Maximum Flow rate g/s

ZB05(D)

4:1

33.2

4PA

G1/2''

NPT1/2 ''

NPT1/2''

400

ZB07(D)

7:1

56

7PA

G1/2''

NPT3/8''

NPT3/8''

280

4ZB06

6:1

48

6PA+PI

G1/2''

PT3/4''

PT3/4''

1600

ZB10

10:1

83

10PA

G1/2''

NPT3/8''

NPT3/8''

160

4ZB10

10:1

83

10PA+PI

G1/2''

PT3/4''

PT3/4''

900

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 application of such air driven refrigerant pump
Factory pictures