Check valve on down-the-hole drilling rig

A drill pipe float valve, also recognized as a non-return valve, is a specialized valve installed in the bottom hole assembly (BHA) and its primary function is to serve as a check valve, permitting the downward flow of drilling mud through the drill string but preventing any unwanted fluid from flowing back up into the drill string. [pdf]

How to check the model of the screw air compressor head

To find your air compressor model, start by checking the unit itself for a nameplate or label that indicates the model number. If it’s not visible, consult the owner’s manual or any documentation that came with the compressor. [pdf]

How to check the fault light of screw air compressor

Check the pressure and temperature sensor and start button. If there is a disconnection or poor contact, it needs further inspection. Check the controller program. If it is a procedural error, you need to change the phase sequence of the power supply. Inspect the body.. Check the pressure and temperature sensor and start button. If there is a disconnection or poor contact, it needs further inspection. Check the controller program. If it is a procedural error, you need to change the phase sequence of the power supply. Inspect the body.. First, check that there isn't a very high air demand, or air leak somewhere. If the capacity of the air compressor is really too low, check the following: Check differential pressure over oil separator. Replace separator when necessary. Check and replace compressed air filters (if installed). [pdf]