Pneumax - Hauptkatalog Pagina 782
Commercieel klantenaanbod**Beste verkopers van Pneumax GmbH
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Pressure booster Series 1700 Series 1700 - Pressure booster General It is not unusual that, during some applications the thrust generated by a pneumatic cylinder is not sufficient for the specific purpose it has been designed for. In order to get over the problem, the working pressure may be increased to a maximum line pressure which normally is 6 7 bar; alternatively the problem is solved by an higher bore cylinder that suits the machine. Three size pressure boosters, with pressure ratio of 2 - 1, have been designed to avoid these problems. This device is utilizing the compressed air of the circuit where it is installed. CHAMBER 2 CHAMBER 3 IN EXH CHAMBER 1 EXH CHAMBER 4 OUT Instructions for installation and use It is advisable to install a small air tank after the pressure booster to avoid pressure pulsation effects. Discharge the down stream circuit before any maintenance operation as the inner circuit of the booster does not allow the down stream line discharge even if the inlet pressure drops down. Maintenance Pressure booster has an average life of about 20 millions of valve cycles, depending on working conditions (every back stroke corresponds to one valve cycles ). A proper lubrication and filtration of air improve the life of pressure booster parts. It is advisable to protect the exhaust ports in environment. Replaceable spare seal kits are available. How to calculate the required time of pressure booster to increase the air pressure in a tank whose capacity is known. Operating Data: P1 = Inlet pressure P2' = Tank initial pressure P2'' = Tank final pressure V = Tank volume PROCEDURE : 1) Calculate the ratio K’ between the initial pressure of the tank and the inlet pressure of the booster ( P2' / P1 ). 2) Calculate the ratio K” between the final pressure of the tank and the inlet pressure of the booster ( P2'' / P1 ). 3) Locate the intersection point between the ratio K’ and the curve on filling time diagram related to the specific booster. Trace a vertical line from the above point and read the correspondent time T’ (the example shows the ratio K = 0.8 and correspondent time of about 4.8 seconds). 4) Repeat same procedure also for ratio K” to get time T”. 5) Use the following formula T = (T"-T') to obtain the total time required to move the pressure P2' to P2'' of tank volume V. 2 | 208 Filing characteristics (5 liters tank) 35 30 Filing time (s) Air Service UnitS 2 Construction and working characteristics The working method is based on the pump effect of the four chambers cylinder as shown in fig. 1. Two chambers are alternatively compressing the air in the boost one, while the fourth one is discharging. By means of an internal circuit, the pressure booster keeps on pumping air till the down stream pressure reaches a value double the inlet pressure. In these circumstances there is a balance condition. When the down stream pressure decreases, the pressure booster starts again its alternating cycle till a new balance condition is restored. The pressure booster can be furnished complete with pressure regulator installed on the inlet port for getting an accurate outlet pressure value. A wall mounting plate is also available. 25 20 15 10 5 0 0 0,2 0,4 0,6 0,8 1 1,2 1,4 1,6 1,8 Ratio k (P2/P1) Overall dimensions and technical information are provided solely for informative purposes and may be modified without notice P1 = inlet pressure P2 = tank pressure 2
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