Spool valves provide precise shot accuracy along with "high volume" capacity over a range of material viscosities, shot sizes and pressures. They feature "suck-back" anti-drip as well as a fast on/off dispensing function that is not affected by material input pressure. An optional oil chamber creates an additional liquid seal to prevent moisture from being carried on the spool, excellent for moisture sensitive materials. Pneumatically activated, the valves can be used with an internal spring close (single acting) or an air-closing connection (double acting). Output is a ¼" NPT allowing multiple tip termination. This is the only valve type which allows multiple types of tips to be used. The TS5322 mini spool valves are designed for better accuracy with lower pressure. The series operates similar to the TS941, however, it is smaller in size. Use these valves with TS500R digital controller