Bellows Sealed Globe Valve 
* Non-rising handwheel: Free from foreign substance trouble because most threaded surface is covered.
* No leakage by two-stage sealing of double bellows and gland packing.
* Gland packing does not need retightening nor applying pressure on spindle, thus handwheel can be turned with small torque without interference from the spindle.
* Maintenance-free: No need to replace or re-tighten gland packing.