Hydraulic Counterweight Check Valve – DIN Standard, DN700

NSV Hydraulic Counterweight Check Valve – DIN Standard, DN700

This heavy-duty check valve features a robust counterweight and lever mechanism with an optional hydraulic damping system, designed to meet DIN standards. The valve is specifically engineered for large-diameter pipelines such as DN700 . The counterweight ensures rapid and reliable closure when forward flow decreases or reverses, while the optional hydraulic damper allows adjustment of the closing speed to effectively prevent backflow and mitigate water hammer effects in high-flow systems .

Key Features

DN700 Size: Designed for large-diameter piping systems, typically ranging from DN200 to DN2000 .

DIN Standard Design: Manufactured to DIN standards, including face-to-face dimensions per DIN EN 558-1 and flanges per DIN EN 1092 .

Counterweight & Lever Mechanism: Provides consistent closing torque without relying on springs; effective even in high-temperature or demanding services .

Hydraulic Damping System (Optional): Adjustable closing speed (e.g., 70% fast close, 30% slow close) to minimize water hammer and protect pipeline equipment .

Bidirectional / Versatile Installation: Can be installed in horizontal or vertical pipelines (flow upward for vertical) .

Durable Construction: Available in materials such as ductile iron, carbon steel (WCB), or stainless steel (CF8/CF8M), suitable for water, oil, steam, and other media .

Typical Applications

Widely used in pumping station discharge lines, cooling water systems, water treatment plants, and large industrial pipelines where reliable backflow prevention and minimized water hammer are critical . Especially suitable for DN400 and above, where controlled closing dynamics are essential to prevent valve slam and system damage .

FAQ

1.Q: I want to be registered as your agency?

A: Defined inspection and manager’s approval shall be required for being registered as the company’s agency. For specific application method, please consult with sales team. If you are registered as the company’s agency, “Agency Certificate” will be issued.

2. Q:Are you manufacturer or trading company?

A: We’re manufacturer,but our factory name is not named NSV due to we’re professional in promotion NSV brand with best service,and also have sold to many end user success.

3. Q:Do you have any valve in stock?

A:There have a lot of GGC valves(2”&within) in stock,and that can delivery within one week.