Flow-Tek's F15/F30 Flanged Series ball valves feature a floating ball design for low torque and increased cycle life. As standard, larger sized valves feature trunnion-type ball support. These rugged ball valves are ideal for industrial applications.
A thrust washer and thrust washer protector combine to provide the primary seal, reduce torque, and prevent galling. Adjustable stem packing creates a secondary seal between the stem and body. The stem packing is composed of multiple RPTFE V-rings as standard; graphite stem packing is standard on all fire safe valves.
½” – 2” valves feature Flow-Tek's Smart Stem. This stem is self-adjusting due to its Belleville washers allowing it to compensate for environmental changes and wear. 2 ½” – 12” valves utilize an independent packing gland which can be easily adjusted without removing mounting hardware or operator. The packing gland is contoured to uniformly distribute the load across the packing.
Flow-Tek’s interchangeable family of valves feature strong, large diameter stems with live-loaded, self-adjusting seals. Belleville washers are utilized to automatically compensate for changes in temperature and wear. Manual adjustments which can cause damage to the seal and seat are not required. The assembly is secured by a saddle-type lock washer which prevents stem nuts from unthreading in high cycle automation applications.
As standard, larger sized valves feature a trunnion-type ball support. This support helps to maintain continuous contact between the ball and seats, preventing seat deformation and blow-by due to the weight of the ball. The results are less seat wear, lower torque, and longer service life.
Flow-Tek’s seat design ensures bi-directional, bubble-tight sealing with low operating torque. All resilient seats feature relief slots or seat O.D. clearance to relieve pressure past the upstream seat, and positive preloading to ensure low pressure/vacuum sealing.
TFM 1600 is our standard seat material. Optional seat materials provide versitile performance in a range of applications. Options include:
PEEK seats offer high pressure/temperature capability. Tek-Fil® seats offer reduced torque in high temperature, high cycle, and steam service applications. TFM 1600 seats offer the exceptional chemical resistance of PTFE plus lower porosity and permeability, improved temperature range, and reduced valve torques.
Flow-Tek balls are precision machined and mirror finished for bubble-tight shutoff and less operating torque. As an added safety feature, a hole in the stem slot of each ball equalizes pressure between the body cavity and the line media flow.
½” – 4” valve bodies are investment cast and solution annealed/normalized for the highest quality and additional strength. All body castings are marked with a foundry heat number for full traceability. Carbon Steel bodies are phosphate coated to increase corrosion resistance.
Flow-Tek manufactures heavy duty, high quality stems with double “D” connections to ball and operator mounting. Stem and ball design ensure positive contact. All Flow-Tek stems are internal entry and blowout proof for maximum safety.
Flanged Series valves with graphite stem seals have been thoroughly fire tested and meet these standards.In the event of a fire, after heat destroys the primary resilient seat, the ball makes contact with the secondary metal seat, forming a secure seal. The body seal, composed of stainless steel and graphite wound into a spiral, prevents external leakage. Graphite stem rings prevent stem leakage.
All manually operated valves feature a locking device to prevent unintended movement of ball position. Valves sizes ½” - 2" feature a safety trigger that locks the handle in the open or closed position. The handle lock can also be bypassed, if needed, with a small bolt through the handle in the release position. Sizes 6" - 12" feature a travel stop plate that can be secured in the open or closed position with a padlock.
Flanged Series valves offer ease of automation due to an integrally cast actuator mounting pad. ½” - 2" sizes comply with ISO 5211 standards.
