Bray/
VAAS
O-Ported Series Knife Gate Valve
770/780 Series
Operation and Maintenance Manual
Страница 1: ...Bray VAAS O Ported Series Knife Gate Valve 770 780 Series Operation and Maintenance Manual...
Страница 2: ...inder Operated Valves 3 Manual Valves 3 Maintenance 4 Lubrication 4 Packing Replacement 5 Seat Replacement 5 Actuator Maintenance 6 Spare Parts 6 Packing Details 7 Troubleshooting 8 For information on...
Страница 3: ...handling impact or improper storage Do not use abrasive compounds to clean the valve or scrape metal surfaces with any objects The control systems in which the valve is installed must have proper saf...
Страница 4: ...d its components during transit Valve size and brief material specification of body markings such as SS or DI are marked on the valve body Stainless steel nameplate below fixed on to the yoke of valve...
Страница 5: ...o packing Cylinder Operated Valves 1 Connect instrument quality air preferably through an air filter regulator of adequate size The recommended air pres sure is 80 120 psi 5 8 bar Refer to the appropr...
Страница 6: ...ve stem should be lubricated at regular intervals for smooth operation of the valve A lubrication nipple is provided on the collar Cylinder operated valves do not require routine lubrication NOTICE If...
Страница 7: ...o not line up 8 Install the packing gland 3 and gland nuts 2 9 Ensure the gap between the gland and the gate is uniform all around 10 Tighten the gland nuts finger tight plus one turn 11 For Series780...
Страница 8: ...e for Series 770 ACTUATOR MAINTENANCE Pneumatic Cylinder The Bray VAAS pneumatic cylinder actuator is a low maintenance design and does not require routine maintenance It has an FRP tube which is lubr...
Страница 9: ...6 Sq 8 475 2 1 3 8 Sq 8 545 2 1 3 10 Sq 8 650 2 1 3 12 Sq 8 775 3 1 4 14 Sq 10 925 3 1 4 16 Sq 10 1000 3 1 4 18 Sq 10 1100 3 1 4 20 Sq 16 1250 2 1 3 24 Sq 16 1440 2 1 3 Series 780 Valve Size in Packi...
Страница 10: ...fasteners loosen Tighten the super structure fasteners Insufficient air supply Pneumatic operated valves Increase supply pressure Solenoid valve dust accumulation Remove and clean solenoid valve Pisto...
