Hard seal knife gate valve

Product Overview

Hard seal knife gate valves are designed for demanding applications requiring efficient shutoff, abrasion resistance and durability. Featuring robust gate construction and reliable hard seal technology, the valves are ideal for handling corrosive, high pressure and abrasive media in industries such as mining, wastewater treatment, chemical processing and pulp and paper. The hard seal mechanism ensures reliable closure, but zero leakage is not possible in all cases.

Product Features

Hard sealing technology:
Knife gate valves with hard-sealed seats (e.g. metal-to-metal or ceramic seals) have a wear-resistant design and are ideally suited for use with slurries and media containing solid particles. It not only provides reliable closing performance, but also minimizes leakage under certain conditions, thus ensuring effective isolation, but not achieving zero leakage.

Knife gate design:
The valve utilizes a knife-edge gate to effectively shut off viscous, highly viscous and solid-particle-containing media, ensuring smooth and efficient flow control.

Heavy Duty Construction:
The valves are made of high-strength materials such as cast iron, carbon steel or stainless steel and can withstand harsh environments including high-pressure conditions and corrosive media.

Minimum leakage:
While hard seal knife gate valves are not completely zero leakage, they are capable of providing a controlled minimum leakage rate, which is acceptable for many non-critical applications where minor leakage can be tolerated.

Corrosion and abrasion resistance:
Hard sealing materials (e.g. metals or ceramics) have enhanced corrosion and wear resistance, making the valves suitable for abrasive media or corrosive environments.

Low maintenance requirements:
Hard seal knife gate valves feature a durable sealing mechanism designed to handle tough operating conditions with long service life and low maintenance requirements.

Product Advantages

Effective isolation: Hard seals provide reliable closure and isolation, ensuring leakage is minimized in most applications.

Durability: Metal or ceramic sealing materials extend the service life of the valve, making it suitable for abrasive and corrosive media.

Versatility: The valves are suitable for a wide range of applications including wastewater treatment, chemical processing, mining, and the pulp and paper industry.

Low maintenance costs: Rugged construction and durable seals reduce maintenance costs and downtime, ensuring long-term efficient operation.

Pressure and temperature resistance: The valve can withstand high pressure and temperature changes, easily coping with harsh operating conditions.