Wolkair User's Manual
Contents
1. WOLKAIR com Registered trade mark in GERMANY WYO Wolkair User s Manual Summary Wolkair GU Series of screw air ends is a kind of oil injected rotary air ends Wolkair GCU Series compact design and easy handling of this product range GCU Series incorporate seven components in one unit air filter intake valve air end oil reservoir separator system and thermostatic valve The integrated design make the system more efficient and smaller in size The GU GCU series are use for assembling air compressor and covers a power range from 4 55 kW 6 75 hp Screw compressors are especially suit for the long time continuous work conditions www woyo cn com WOLKAIR Registered trade mark in GERMANY Nameplate The nameplate is attached on every unit housing If you have any questions just quote the data on the nameplate so that you can get the right information WOLKAIR Registered trade mark in GERMANY TYP GCU SER NO Structure The rotors are supported by bearings there are screw or flange on the intake end and the discharge end for mounting There is axial seal for housing and rotors and radial seal for the drive shaft There is orifice in oil recovery pipe all the Wolkair air ends and compact units have this orifice www woyo cn WOLKAIR Registered trade mark in GERMANY com Storage Recommended maintenance oil For the surface of the housing T2. ecrex 39 Mobil Rust Ban 324 Esso U Product 9703 Shell For the internal of the unit Lub MZ 20 W 20 Esso Ensis Motor Oil 20 Shell Mobilarma 523 524 Mobil The above mentioned are only to the long time storage units For temporary storage you must ensure the ambient dry and with no shock do not remove the covers on the intake and discharge end of the units so that to prevent from anything fall in www woyo cn com WOLKAIR Registered trade mark in GERMANY Driving and Installation Driving Wolkair air ends can be driven by electric motors or internal combustion engines The correct direction of rotation indicated by the arrow on the housing of the unit Wrong direction will course irreversible damage to the unit in several seconds V belt Pulley A suitable V belt pulley must be mounted on the drive shaft if the compressor is V belt driven The pulley should be adapted to the compressor shaft and balanced to 100 concentricity The pulley should be made of cast iron www woyo cn WOLKAIR Registered trade mark in GERMANY MERL COMPRESSOR When placing and tightening a guidance line the distance A or B should be O zero Max 0 2mm Perform the horizontal alignment by shifting the motor pulley on its shaft Perform the lateral alignment by turning the adjusting screws After the adjustment tighten the motor fastening screws securely The diameter of the pulley should be calculated p
3. et of the oil cooler should be about 20 C www woyo cn COMPRESSOR WOLKAIR Registered trade mark in GERMANY Other interface The interface beside the intake flange can be used to connect the security pressure switch to protect the air end from the wrong rotation direction or start up with pressure www woyo cn WOLKAIR Registered trade mark in GERMANY com Lubrication The lubrication starts when the air end start running the necessary pressure is already formed in the oil air separator tank The minimum pressure valve maintains the necessary work pressure which can not be less than 3 5Bar when the air end running When the air end is idle running the oil pressure could not be less than 1 Bar g The break point of temperature is 110 C Oil is cooled to 50 60 C filtered than injected to the compress cavity Usually One interface is enough The bearing lubrication is practiced by the internal pipe of the air end Unobstructed pipeline and efficient oil air separator ensures the oil circulate without loss The oil change frequency is designed once per 4000 hours but for the existence of the environmental pollution and air impurities we suggest to check the oil every 2000 hours and change the oil when necessary www woyo cn com WOLKAIR Registered trade mark in GERMANY The function of the oil 1 To lubricant the rotors and the bearings 2 To ensure the seal between t
4. he rotors or between the rotor and the housing 3 To cool the system 4 To decrease the noise Wolkair air end do not need oil pump the oil circulation is driven by the oil pressure www woyo cn com WOLKAIR Registered trade mark in GERMANY Oil Selection Wolkair Screw Compressors must be operated with suitable Oil It must be suitable for use in different conditions such as contamination of the intake air by gases solvent vapours exhaust gases and in high ambient temperature Use the same product and the same oil type Do not mix different oil types If the ambient temperature is close to the oil freezing point protect the unit from freezing The oil for screw compressor should meet the following requirements 1 High ageing stability 2 High dispersive capacity 3 Low emulsification tendency 4 Flash point above 200 C 5 Pour point minimum 5 degrees below the lowest ambient temperature 6 Viscosity class of the oil should be ISO VG32to68 www woyo cn WOLKAIR Registered trade mark in GERMANY com Preparations for start up Before running the compressor check it make sure it meet the specifications There may be no oil in the air end after transportation and storage Add 1 4 to 1 2 clean oil into the air end from the intake then rotate the rotor by hand before start If the compressor has a too long idle time you should also do this Fill the oil tank You can start up the co
5. mpressor after check all the equipments in it www woyo cn com WOLKAIR Registered trade mark in GERMANY Warranty Wolkair provide a 24 month warranty for the airend and 18 month for the Shaft seal The warranty is not include Operating errors faults Inadequate maintenance Non compliant fuels working materials Failure to use original spare parts Reconstruction conversion work on the unit www woyo cn WOLKAIR Registered trade mark in GERMANY com Maintenance Maintenance and repair work may only be executed under the supervision of a person qualified for this work 1 2 3 Use the suitable tools for the maintenance and repair work Use the original spare parts Execute and maintenance or repair work only when the unit is switched off and the power supply is disconnected Make sure that the unit will not be switched on unintentionally Cut off the unit from any pressure sources and discharge the unit from pressure before removing a part Take care that extreme cleanliness is observed during maintenance or repair Keep away dust Cover parts or bare should be opened with clean cloth or paper Make sure that No tools and loose parts etc are left in the unit www woyo cn
6. recisely because the rotation speed of the air end depends on it www woyo cn WOLKAIR Registered trade mark in GERMANY com V belt tensioning V belt tensioning is effected by the setscrew located directly at the motor mounting First testing after 2 working hours then after 24 working hours and finally every 1000 working hours The V belt should be SPZ SPB SPA profiled and belt length according to the relevant unit type Intake air filter The filter cartridge with a fineness level of lt 0 02m is fit for the intake air filter Fineness level of the oil filter lt 0 010mm for the units smaller than 30kw lt 0 025mm for the units larger than 30kw Oil path Please use cylindrical connector and copper washer no teflon tape and sealant when connect the oil inject hose Do not use tapered connector for it may split the casting www woyo cn WOLKAIR Registered trade mark in GERMANY com Mounting If mounting from the bottom of the unit the support surface must be processed after welding to ensure its smoothness or else uneven surface may make the air end distorted The torque values given below apply to bolts in a greased condition Temperature control The temperature sensor is fitting at the discharge end of the unit A screw compressor must be working in right temperature to avoid the precipitation of liquid water The temperature difference between the inlet and outl
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