Over thirty years in manufactory and design of hydraulic field
GRH is specialized in providing hydraulic components and solutions to hydraulic systems.
With persistent improvement and enthusiasm over the past 30 years, GRH has been an emerging power in fluid powerindustry since it was established in 1986.
Research and innovations on new products are the driving force that keeps GRH making progress. Standards ofISO9001 and TS16949 are our guiding principles. Employees’ capabilities and creativities are major factors that differedGRH from other competitors.
GRH designs and produces hydraulic gear pumps / gear motors, mono-block valves, sectional stack valves, proportionalvalves and gear motor flow dividers. These components are mainly used on industrial machineries, material handling,construction machineries, agricultural and industrial fields. Beside the products in GRH catalogue, GRH have a closecooperation with our customers by offering them solutions to hydraulic systems. We are fully aware of the contributionsthat customers have made during the system design process. Our customers can count on GRH’s extensive systemdesign and application experiences when they design their hydraulic systems.
GRH has designed and developed a series of load sensed proportional stackable valves to help customers to improvevalve’s operating performances as well as to improve system efficiency.
GRH : Shanghai Guorui Hydraulic Technology Co., Ltd is responsible for sales abroad
Jiangsu Guorui Hydraulic Machinery Co., Ltd.—Manufactory and is responsible for domestic sales
GRH will work together with the customers to create a better future.
GRH gear pump brief introduction:
Gear Pump of Guorui Hydraulic features floating bush structure with the function of automatic axial
clearance compensation. Special abrasion resistance recipe of the bush supplied the long service life;the gear precisely machined ensured the excellent operation with low noise; cold-extrusion profile pumpbody can endure the pressure over 30Mpa; high strength cast iron of front/back cover is more reliableto operate . It can be widely used in industrial hydraulic system, hydraulic system of mobile mechanism,hydraulic system of aerospace system, hydraulic system on the ship and the hydraulic system onocean engineering.
Pumps with valve
PTO gear pumps
Volumetric efficiency up to 98%
Flanges,shaft ends and ports
GRH gear pump character :
1.GRH gear pump are produced in 7 different versions(0P,1P,1.5P,2P,2.5P,3P,3.5P) and in eachgroup different displacement are obtained by change the gears width ,pleas to look performance curvepage 5 to page 8.
2.pressure :GRH can supply two rate F;G of pressure,pleas to look below drawing:
3.efficiencies:volumnetric up to 98%.mechanical up to 93%.
4.many different mounting combination about flanges ,shaft ends and ports are fullyinterchangeable with the main standards of market.
5.seals:all pump can be equipment FPM seals .
6.integrate:all pump can be combination with relief valve and check valve .
To achieve the performance it necessary not only to meet the catalogue but also totake real care of the design of the hydraulic as a whole ,in particular:
1.the design of the hydraulic circle ,especially the suction line , dimension and position of thevalves ,the filters the reservoirs and the heat exchanger.
2.ensure correct and frequent cleaning and maintenance of the circle and of the hydraulic fluid .
3.equip the circuit with suitable alarm and safety devices.
4.avoid possible starting under load at lower temperature .
5.avoid high pressure at low speed.
6.in reason choice oil is major factor.
fluid must be specifically for hydraulic equipment ,it must be nonfoaming,antioxidant,noncorrosive and have good lubricating features meeting the followingrequirements:
recommended use:GB11118-94::L-HM46 or equate NFE-603/DIN51524Ⅱ-85
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Minimum rotational speed:
we recommend a minmum rotational speed for every pump groupas follows:
Hydraulic circuit :
1.avoid shard restrictions and small radius bends.
2.place safety relief valve set at correct pressure and with good dynamiccharacteristic.
3. recommended fluid speed in the inlet line—1.6~5ft/s(0.5~1.5m/s).
4.recommended fluid speed in the delivery line—6.5~20ft/s(2~6m/s).
5.recommended fluid speed in the return line—5~10ft/s(1.5~3m/s).
6.reservoir should have a capacity about twice as much as the volume Of delivered bythe pump in one minute.
7.the return and inlet pipe must be saparated as far as possible and under the minmumlevel of the oil.
8.install pump in a well cleaned environment,and make sure ,prior starting the systemthat all pipea and reservoir are perfectly clean it is recommended to filter thenew oil at 8-10um,
before filling the reservoir.
9.fill the pump with fluid befor installing and check the direction of rotation .
10.for the first run of the pump it is advisable to disconnection the pump diacharg in
order to purge the air from the system.
Packing and shipment:
each item packed alonein carton with plastic bag;
4pcs packed in a carton with labelfor 3PF;
6pcs packed in a carton with label for 0PF,1PF, 2PF;
12pcs packed in acarton with label for 0PF;
Sample orderpacked with carton, commonlydelivery by air;
Full order packed with pallet,commonlydelivery by sea;
1.by far largest number of premature failures of gear pumps are due to contamination; filtering with clogging indicating and alarms is recommended .
2.the initial contamination of the fluid must not exceed clss 10 NAS 1638,passexperience has shown that even brand new fluid often exceed this value.in thiscase it is recommended below:60 um inlet ,and in the return side:
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1.the pump must be in line with the P.T.O.
2.do not apply radial or axial loads on the pump shafts,the use of three coubling isrecommended.
3.make sure that the absorbed torque does not exceed the max.torque allowed for theshaft.
4.belt and gear drive not recommended because they affect the pum performance andlife .
1.deliveries are carried out under the conditions of shanghaiguorui .
2.this catalog is issued to provide outline information only .we reserve the rightto change without any notice the design,fratures.
3.please relat us if you have special request .
1.Each item tested before delivery;
3.GRH R&D department: full technician support;
4.GRH quality department: Your feedback help us perform better;
5.Exhibition:Bauma Germany,Shanghai PTC and other fairs;
6.Samples will be sent to you by DHL,FEDEX according to your requirments
or find the cheapest forwarder for you.
A: Full order: 30% as deposit, the balance before shipment;
Small order /sample order: full payment in advance;
A:Yes.Full order shold mark your brand and code;
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