Opening pressure (setting pressure) adjustment Within the specified working pressure range, the opening pressure can be adjusted by rotating the adjusting screw and changing the spring preload. Demolition of the valve cap, loosen the lock nut, the adjustment screw can be adjusted First of all, the inlet pressure increases, the valve take off once, if the opening pressure is low, then adjust the clockwise screw adjustment; if Open the high pressure, then press the anti-clockwise to loosen it. After adjusting to the required opening pressure, tighten the lock nut and install the cap. If the required opening pressure is outside the working pressure range of the spring, another spring with the correct working pressure range needs to be changed and then adjusted. After changing the spring, the corresponding data on the rating plate should be changed. When adjusting the cracking pressure, the following points should be noted: When the medium pressure is close to the cracking pressure (more than 90% of the cracking pressure), the adjusting screw should not be rotated to prevent the flapper from rotating and damaging the sealing surface. In order to ensure that the opening pressure value is accurate, the medium conditions for adjustment, such as the type of medium and the temperature of the medium, should be as close to the actual working conditions as possible. Changes in the type of medium, especially when changing from liquid phase to gas phase, the cracking pressure often varies. Operating temperature increases, the opening pressure is reduced. Therefore, the adjustment at room temperature for high temperature, the temperature setting pressure should be slightly larger than the value of the ball to the account. Adjustment of discharge pressure and back pressure If the discharge pressure or back pressure is not satisfactory, the adjustment ring on the valve seat can be used to adjust the opening pressure. Unscrew the adjusting ring fixing screw, insert a thin iron bar from the exposed screw hole and the like tools, you can dial the gear ring on the adjusting ring so that the adjusting ring turns around. When the adjustment ring to the right counterclockwise rotation, the position increases, the discharge pressure and the seat back pressure will be reduced; the other hand, when the adjustment ring to the left for clockwise rotation, the position decreases, the discharge pressure and Return seat pressure will have increased. Each adjustment, the adjustment ring rotation should not be too large (usually within 5 teeth). After each adjustment, tighten the set screws so that the ends of the screw are located in the grooves between the two teeth of the adjustment ring to prevent the adjustment ring from rotating, but not to create lateral pressure on the adjustment ring. Then the action test. For safety reasons, the dial should be adjusted before adjusting the pressure to reduce the pressure relief valve (generally should be less than 90% of the opening pressure), to prevent the valve suddenly opened in the accident, the accident. It must be noted that the safety valve discharge pressure and back pressure test, only when the gas flow is large enough to make the valve does not open (that is, when the rated discharge of safety valve) is possible. And usually used to check the safety valve opening pressure test bench capacity is very small, then the valve can not be fully open, the pressure is also false back seat. When calibrating the opening pressure on such a test bench, it is usual to adjust the adjusting ring in a relatively high position in order to make a clear take-off. However, this is not suitable under actual operating conditions of the valve and the adjusting ring must be readjusted. Lead seal safety valve after all adjustments should be carried out seal, in order to prevent arbitrary changes have been adjusted to the situation. Safety valve factory, unless otherwise specified, the ambient temperature is usually the upper limit of the working pressure level (ie high pressure) value adjustment. Therefore, users generally need to re-adjust according to the actual working conditions. Then re-seal.
This micropipette enables true one-handed operation without changing the holding position: adjust volume, Pipette, remove tip.
Regardless of the volume, you can use your pipettes for ergonomic and efficient operation. The operation force is small and the stroke is short, which can easily handle long-term continuous pipetting operations. It is designed with perfect ergonomics for a comfortable grip in any hand position, right or left, large or small.
Even when wearing gloves, the range lock can be easily operated to lock the set range and prevent accidental adjustment errors. For a quick calibration experience, easy-to-calibrate technology makes calibration a snap. Calibration can be done without auxiliary tools. Compatibility tables describe how tips fit into pipettes, making it easy to find the right tip.
single channel adjustable pipettes,variable volume single channel pipettes,single channel pipette set
Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yongyuecultureplate.com