The Air Spool Valve on a Diaphragm Pump is the single most important component. The quality of the Spool Valve design determines how reliable a pump will be and ultimately how much money pump will cost an end user in purchase, and how much money will cost pump maintenance over the years.

New YTS design has many proven features and benefits specifically designed to help increase the pumps on/off switching reliability, lengthen operational life time and generally improve air motor parts life.

The Looped C™ Spool operates without the need for lubrication and is available only from YTS.

YTS shaft of Looped C® Air Spool Valve made mainly from Aluminium is 65% lighter than similar competitive shaft. This helps to switch the air circuit quickly and smoothly and operate faster. Lighter YTS shaft requires less air pressure to change its position.

Due to shaft light weight Looped C® Air Spool copes easily with high viscous liquids or high back pressure from discharge line.