Keystone RTF990 DN125 EPDM Rubber Sealing Sleeve, for Butterfly Valves, 5-inch (DN125) Wafer/Lug Type

Keystone RTF990 DN125 EPDM Rubber Sealing Sleeve

The Keystone RTF990 DN125 EPDM rubber sealing sleeve is a critical replacement component designed specifically for DN125 (5-inch) Keystone butterfly valves. This high-quality sealing sleeve, often referred to as a "liner" or "seat," plays a pivotal role in ensuring the tight shut-off and leakage prevention within the valve assembly.

Manufactured from EPDM (Ethylene Propylene Diene Monomer) rubber, the RTF990 sleeve offers excellent resistance to a wide range of media including hot and cold water, diluted acids, alkalis, alcohols, ketones, and steam. Its EPDM composition provides superior elastic properties, excellent weather and ozone resistance, and a broad temperature operating range typically from -40°C to +120°C, making it ideal for numerous general-purpose industrial and HVAC applications.

The design of the sleeve is tailored to fit the internal contours of compatible Keystone butterfly valves, ensuring a perfect seal against the disc when the valve is in the closed position. Regular maintenance and replacement of the sealing sleeve with genuine Keystone parts like the RTF990 are essential to maintain the valve's optimal performance, prevent costly leaks, and extend the operational life of the entire system.

Manufacturer Information:

• Manufacturer: Keystone (A brand of Emerson)
• Series: RTF990 (Designation for EPDM Rubber Sealing Sleeve)
• Part Number: RTF990 DN125
• Product Type: Butterfly Valve Sealing Sleeve / Liner / Seat
• Material: EPDM (Ethylene Propylene Diene Monomer) Rubber
• Nominal Diameter: DN125 (125mm) / 5 inches
• Sealing Type: Rubber ring sealing
• Temperature Range (Typical): -40°C to +120°C (Material dependent)
• Media Compatibility: Hot/cold water, diluted acids, alkalis, alcohols, ketones, steam.
• Application: Replacement part for Keystone butterfly valves to ensure tight shut-off and prevent leakage in HVAC, water treatment, general industrial, and chemical applications.