CHECK VALVES

Types:

• Swing check / Dual plate / Tilting Disc / Piston check / Ball check / Single
• Disc / Axial check

Construction:

• Bolted bonnet / Pressure seal
• Wafer / Lug / Double flanged

Optional features:

• Position indicator
• Locking devic
• Emergency assisted valves
• Dumpered valves

Materials:

Ringo Válvulas Check valves are supplied with all material types to fulfill all the different combinations of service fluid, design pressure and temperature. Valves can be supplied either forged or casted based on customer specifications. Following materials are under the scope of supply of Ringo:

• Carbon Steel valves
• Low temperature carbon steel
• High temperature alloy steel
• Stainless Steel Valves
• Super Austenitic Stainless Steel
• Duplex Stainless Steel
• Super Duplex Stainless Steel
• Ni Alloy
• Titanium
• Aluminum bronze

Swing Check Valves

Valve disc is provided with antirota-tions pin. Full opening swing check valves to API 6D or API 6A suitable for pig passage are also available.

Piston Check Valves

Normally upto sizes 2”, (larger sizes are also available) both T-Pattern and Y-Pattern are available.

Tilting Disc Check Valves

When the check valve must be operated by a very small pressure drop this design is used. Valve disc is balanced in such a way that very small variations of pressure open/close the valve. This reduces substantially the pressure drop across the valve.

Emergency Assisted Check Valves

Used in the turbine steam extractions of power plants. Valve is provided with a pneumatic piston and solenoid valve in such a way that when a closing signal is received in the solenoid valve the air in the pneumatic piston is released starting the closing stroke of valve disc and ensuring fast valve closing by fluid-media.