ANSI WCB SDNR Valves:

They have a wide operating temperature range, covering most standard applications such as ambient-temperature water supply, medium-temperature steam, and oil transportation.

They are more cost-effective than other materials, such as stainless steel and bronze, and are suitable for general-purpose applications at medium and low pressures.

ANSI SS316 SDNR Valves:

They offer strong corrosion resistance and maintain good strength and corrosion resistance even in high-temperature environments;

They feature a more aesthetically pleasing surface and meet sanitary-grade requirements.

Resistant to brittle fracture in cryogenic environments, making them suitable for low-temperature piping systems such as those carrying liquid oxygen and liquid nitrogen.

ANSI Tin Bronze SDNR Valves:

Bronze offers greater stability and resistance to corrosion in seawater applications;

With a low coefficient of friction, the sealing surfaces are less prone to scratching during opening and closing, ensuring a long service life.

Routine Maintenance:

‌Cleaning and Rust Prevention‌: Wipe oil residue from the valve body; for minor rust, sand it down and apply approved anti-rust paint. Do not use highly corrosive cleaning agents.

‌Tightening Components‌: Tighten the flange bolts in a diagonal pattern, ensuring the torque does not exceed the limits specified in the manual to avoid damaging the gasket.

‌Functional Testing‌: Manually move the valve disc 3–5 times to ensure there is no sticking, and apply silicone-based grease to moving parts.

Internal Disassembly and Inspection‌: Remove the valve disc and spring to inspect for wear on the sealing surfaces and loss of spring tension, and clean out any internal debris.

Replacement and Pressure Testing‌: Replace aged seals, and after reassembly, perform a pressure retention test to confirm there are no leaks.