Check valves are critical components used in piping systems to prevent reverse flow. Stainless steel check valves are designed to provide leak-free operation, reliability and corrosion resistance in a variety of industrial processes.
Tell You How Stainless Steel Check Valves Work
A check valve contains a movable plate or disc that pivots to open or close the valve. When fluid flows in the intended direction, the disc or plate lifts and fluid passes through. When the flow reverses or stops, the disc drops to seal the valve shut.
Several types of stainless steel check valves are available:
• In swing check valves, the disc rotates around a hinge, swinging open to allow forward flow and tightly closing when the flow reverses.
• Lift check valves feature a disc on a hinge that lifts straight upward to open when fluid flows in the forward direction.
• Dual plate check valves use two opposing discs that pivot towards each other to seal closed when fluid attempts to flow in reverse.
• Spring check valves incorporate a spring to rapidly assist the disc in snapping fully closed when reverse flow occurs. The spring provides a stronger shut-off force.
Benefits of Stainless Steel Check Valves
Stainless steel provides several advantages in check valve designs:
• Corrosion resistance – Stainless steel resists corrosion from water, salt, acids and bases better than carbon steel.
• Strength – Stainless steel valves are designed for high-pressure systems and contaminants.
• Durability – Stainless steel components have long lifespans, resisting wear and galling.
• Fabrication – Stainless steel check valves can be welded and fabricated for complex designs.
• Sanitary – Stainless steel meets FDA and USDA requirements for food grade applications.
• Low maintenance – Properly maintained stainless steel check valves require infrequent servicing.
The Applications For Stainless Steel Check Valve:
• In chemical processing applications, stainless steel check valves are selected for their resistance to acids, bases and other harsh chemicals present.
• Stainless steel check valves are commonly used within bleaching, pulping and chemical recovery systems in the pulp and paper industry where they withstand corrosion from chemicals.
• Food and beverage facilities like pasteurizers, bottling lines and breweries rely on stainless steel check valve to meet stringent sanitary requirements for food contact.
• The corrosion resistance and cleanability of stainless steel check valves make them suitable for use in pharmaceutical manufacturing plants where they can withstand harsh chemicals and meet sanitary standards.
• Stainless steel check valves are chosen for handling aggressive chemicals in the semiconductor industry within etchant and photoresist systems due to their durability.
• In power plants, stainless steel check valves are implemented within boiler feedwater, condensate and cooling systems where they can operate reliably under high pressures and temperatures.
• Stainless steel check valves are specified for oil and gas applications like fracturing systems, pipelines and refineries to withstand abrasive fluids and corrosive environments.