APPLICATION

DVD Sw ing Type Check Valves are design ed to have minimum head loss in n o rm al o perati o n and to have dri of backflow. These check valves are commonly used in th e down st ream of pump stati o ns, pr o t ectin g crucia

FEATURES

• Suitabl e for ho rizontal and verti cal install ati o ns.
• Po ta b le wat er and sewag e appli cati o ns.
• Lever& count erwe ight or sprin g accesso ries are availabl e upon reques
• Singl e or do ubl e sid ed lever & count erweight option
• Pro t ection cover accessory is availabl e upon request, in o rder to prot ect th e lever m ove me
• Limit sw it ch accesso ry is avail abl e upon requ est for scada comm s &

alarm s.

• Dashp o t accesso ry is availabl e upon request for non- slam operati o n.
• Opti onal b ypass valve is availabl e upon request for large siz

FULLY VULCANISED DISC

DVD Sw ing Check Valves pr o vide a full y vulcaniz ed one-piece disc desig n (450>). The benefit s are; ease of cleani ng and m aint enance, high corrosio n resist an ce and sup erio r sealing. Vulcani zed  disc can pr o vide sealing even in  low  bac k-pr essur e (2m wc)  with out a lever  & counterweight. Furth erm ore, vulcaniz ed disc ensur es lon g term operatio n sin ce no metal pa rt ge ts corroded and comp ressio n t est enab les n o n-d eform ati on o f rub be r.

RELYING ON DVD RINGS FOR SEALING

Sw ing Check Valves h ave a body ring and a dis c ring (DN400<) w hi ch enab le drip tight sealing. Whe n body and di sc rings m atch with eac h oth er, th ey pro vide sealing . Howeve r, m etal to m etal sealin g n eeds hi g h exp erti se an d high qualit y of pro du cti on. DVD exp ertis e in prov iding drip tight sealin g in Me tal-Me tal Sw in g Chec k Valves d epends o n th e qualit y of desig n, mat erial , ma chining and installati o n of th e Ring s t o th e val ve body. Depending on th e size, pressur e rating and appli cati o n, DVD can inst a11 t h e ring s b y press-fitting , th reading o r we lding processes. Furth erm o re, brass, b ronze, nickel alu m inum br o n ze, stainl ess st eel 304, 316 mat erial o pti ons are avail abl e upon requ est for diff erent needs.

DVD Swing Type Check Valves are desig ned as a n on-return valve.The disc opens i n norm al flow directi on, providing of back flow, the disc act s an d closes the valve. The disc is g u id ed by the sh aft sup p o rted on two bearings. These bearin open-end for acc essory connections such as lever, sp ring or lim it switch. The disc matc hes with the bo dy ring to p

ru bbe r an d metal-m etal sealin g designs are avail ab le upon request depen ding on the valve size.