Search Telephones for communication +7 (4912) 50-50-05 +7 (495) 783-68-15 Production of ventilation and fire-fighting equipment About us news Certificates Price list For the designer Our partners Contacts Product Catalog FIRE-FIGHTING EQUIPMENT Fire damper Smoke exhaust fan (DU) Back-pressure fans Automation for fire fighting equipment GENERAL EXCHANGE EQUIPMENT Central air conditioner VKC Channel equipment (European standard) Roof fan VKVT Round duct equipment Compact air handling unit VKJet Air heating equipment Automation for general exchange equipment Heat carrier control units network hardware Damper aluminum VKZ (A) Insulated damper VKZ (G) / VKZ (H) Throttle valve VKD Check valve VKO Silencer VKN Reinforced damper VKZ (C) Aluminum grill VKR (A) Decorative grille VKR (D) EXPLOSION-PROOF EQUIPMENT Explosion-proof axial fans and additional equipment Explosion-proof radial fans and additional equipment Explosion-proof roof smoke exhaust fans and additional equipment Central air conditioners VKC-Ex Fireproof explosion-proof dampers Explosion-proof network equipment news 11.08.2017 Dear colleagues! Congratulations on the Builder's Day! 12.06.2017 Dear colleagues! We congratulate you on the Day of Russia! 05/05/2017 Dear colleagues! We congratulate you on the Great Victory Day! 04/27/2017 Reduced prices for KDM fire dampers! all news → Check valve VKO Download specifications in PDF → General purpose check valves are used to prevent air flow through the ducts when the fan is off (stopped). Check valve VKO round section) Check valve VKO two-piece Check valves are made of galvanized steel GOST 19904-90, and flanges are made of steel GOST 19904-90, followed by painting with enamel. Check valves under operating conditions are designed for climatic modification U3 in accordance with GOST 15150-69. The limiting values of the ambient air temperature are from -30 to + 40C in the absence of direct exposure to atmospheric precipitation. The non-return valve is designed for installation in a system with a pressure of up to 500 Pa. The valves are manufactured in rectangular and round sections. The dampers can be installed both in the vertical and in the horizontal section of the duct. Installation of check valves in the network is allowed at air velocities in horizontal sections of at least V = 5.6 m / s, and at vertical sections - at least V = 4 m / s. The vertical position of the valve shaft during installation is not allowed. The valve consists of a body and a damper mounted on an axle. On one side, a counterweight with a weight is attached to the blade axis, which allows the blade to be kept in a closed position when the fan is not running and ensures its smooth opening when the fan is turned on. The valve operation is adjusted by rotating the counterweight relative to the axis and moving the weight along the counterweight lever. Length of the round section check valve: - from 200 to 450 - L = 100 mm; - from 500 to 710 - L = 150 mm; - from 800 to 1250 - L = 200 mm. Length of the check valve of rectangular section: - for ВхН from 150х150 to 450х450 - L = 100 mm; - for ВхН from 500х500 to 750х750 - L = 150 mm; - for ВхН from 800x800 to 1000x1000 - L = 200 mm. cheap role printing, ya in moscow Buy a pool for a summer residence Equipment for pools and infrared saunas. Delivery conditions. poolfactory.ru Wholesale charcoal Sale of gauze, bandages and cotton wool wholesale e-drova.ru Buy stove professor butakov engineer FURNACE - prices and availability pechirus.ru Website development design group "Galaxy" Address: 390525 Ryazan region, Ryazan district, Polyany village, Novaya str., Building 24 Sales department phone: +7 (4912) 50-50-05