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When purchasing valves, it’s essential to distinguish between new and refurbished ones to ensure reliability and performance. Here are six key tips to help you identify refurbished valves:
1. Inspect the Valve’s Exterior for Signs of Wear
▲ Look for scratches, dents, or discoloration, especially near the flange and body.
▲ Check for inconsistencies in the paint or coating, as refurbished valves may have been repainted.
2. Examine the Fasteners and Welds
▲ Refurbished valves may have replaced bolts, nuts, or gaskets that look newer than the valve body.
▲ Welded areas should be smooth and uniform—uneven or excess welding could indicate past repairs.
3. Check for Re-machining Marks
▲ Look for machining marks inside the bore, sealing surfaces, or flange faces.
▲ If the seating area appears altered or resurfaced, it may have undergone reconditioning.
4. Inspect the Valve's Internal Components
▲ Open the valve (if possible) and check the internal parts like the stem, disc, or ball.
▲ Signs of pitting, uneven surfaces, or mismatched materials indicate past refurbishing.
5. Verify Serial Numbers and Manufacturer Markings
▲ Cross-check the valve’s serial number and model against the manufacturer's database.
▲ Any missing, altered, or inconsistent markings could suggest it has been refurbished.
6. Conduct a Pressure and Functionality Test
▲ A leak test or pressure test can reveal hidden defects in sealing performance.
▲ Operate the valve multiple times to ensure smooth movement without unusual resistance.
▲ By following these steps, you can better identify refurbished valves and make informed purchasing decisions. Do you need help verifying a specific valve?
