Tilting Disc Check Valve
offers unrivaled versatility and reliability while providing a significant cost savings over the life of the valve
Valve disc automatic opening and closing upon pipeline flow and pump operation status.
Energy efficient, non-slam closing
Valve design to EN593, EN 12334 Flange to EN 1092, BS4504, DIN2501, ISO7005, ASME B16.5, ASME B16.1, AWWA C207, AS4087 Face to face length to EN 558-1 / ISO 5752 series 14
The tilting disc conserves energy and provides the lowest operating cost because of no need external power pack/power unit.
The large offset design and disc self-containing weight at the bottom of valve disc make the disc closing rapidly to minimize flow reversal and water hammer normally associated with the sudden stopping of a reverse flow.
Meanwhile the large offset design results in valve disc divided into approximately a one third and a two thirds proportion. This allows the two thirds of flow passing below the shaft to be counteracted by the one third flow passing above the shaft. This counteraction reduces slamming by providing a self-cushioning effect.
The external counterweight attached to the valve by a lever will be designed to assist valve closing. And the counterweight position could be adjusted along the axial direction of lever to accommodate to on-site working conditions.
Stainless steel weld and finished body seat ensures reliable and durable performance in leak tight seating.
Streamlined body and low profiled disc design verified by finite element analysis ensures the higher strength and the low head loss.
Self-lubricating bearing in bronze or stainless steel lined PTFE helps the free operation without stuck.
T profiled resilient seal ring is secured on the disc by a retainer ring and bolts, and ensures reliable performance. The seal ring could be adjusted or replaced easily on site. Don’t need special tools.
Multiple O rings in shaft sealing system provide long life and reliable sealing performance, which is easy to be adjusted or replaced.
Valve externally and internally fusion bonded epoxy coated with a thickness of 250micron (different coating/lining is available when specified) and color code RAL5005/5015/5017.
Optional design to improve features and operating characteristics --Slant seat design: it provides short disc stroke to have a better non-return performance and reduces water hammer. --Limit switch: Mechanical or proximity type limit switches are available for disc position reading out on remote panel and/or secondary system operations. --Position indicator: Disc position indicator on valve --Hydraulic damper/oil dashpot will be designed for some critical conditions, such as high shut-off heads, use pressure tanks or surge tanks, to further reduce the water hammer caused by rapid flow reversal. --The guard shield for counterweight can be supplied when specified. --Extended shaft ends at both sides will be convenient to exchange counterweight position according to on-site installation requirements.
Product Material
Product Dimension
Dimensions/PN10
Dimensions/PN16
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Tilting Disc Check Valve
offers unrivaled versatility and reliability while providing a significant cost savings over the life of the valve
Valve disc automatic opening and closing upon pipeline flow and pump operation status.
Energy efficient, non-slam closing
This kind of butterfly valve has the unique advantages:
– Keeping the main valve closed and bypass valve open. That can maintain minimum flow across the valve to avoid water stagnancy and maintain water quality.
– Equalize the pressure across the valve to enable manual opening in case of power unavailability.
BFV-02-QJ Rubber lined Butterfly Valve, internally with ebonite lining of thickness 3mm or 5mm.
The typical applications of this type of butterfly valves are chemical plants, sea water treatment, desalination projects, nuclear power plants, water treatment, TSE, sewage etc.
Rubber-Seated Butterfly Valves to AWWA C504, designed for drink water, sea water, cooling water etc. NSF/ANSI 61 approval is available.
Design is rated for B valves (max. flow velocity 16ft/sec-4.9m/sec), and absolutely compliance with the requirements in min. shaft diameter, min. body shell thickness and actuator test cycles, workshop testing and Proof-of-design tests etc.
