Industrial Valve Repair and Overhaul Services
As HassasValf, we provide comprehensive maintenance, repair, and revision services for high-pressure industrial valves utilized in heavy industry, petrochemical plants, refineries, and power generation facilities. We understand that valve failures cause critical downtime (shut-down) in process lines. Therefore, we restore your defective valves to their original factory tolerances through reverse engineering, precision machining, and advanced surface lapping technologies.
In-Situ Machining and Precision Lapping
Valves subjected to corrosive fluids, cavitation, and thermal fatigue inevitably lose their sealing integrity over time. Our expert engineering team eliminates micro-deformations on critical sealing components, ensuring maximum operational safety and longevity.
- Seat and Plug/Disc Revision: Precision lapping of seat and disc (plug/wedge) surfaces to achieve micron-level smoothness, ensuring absolute metal-to-metal sealing.
- In-Situ Machining: On-site machining and seat repair of butt-welded valves or large-diameter valves without removing them from the pipeline, significantly reducing facility downtime.
- Spare Parts Manufacturing: In-house CNC production of severely damaged valve internals, including stems, rings, and custom flanges in strict accordance with ASME and DIN norms.
- Complete Valve Overhaul: Full-scale restoration including sandblasting, repacking (gland packing and gasket replacement), actuator calibration, and anti-corrosive industrial coating.
Certified Hydrostatic and Pneumatic Testing
Post-repair testing is the most critical phase of our valve overhaul process. Every repaired valve is rigorously tested in our state-of-the-art testing units. We apply hydrostatic shell and seat tests, as well as pneumatic low-pressure sealing tests, strictly adhering to API 598, API 527, and EN 12266-1 standards. All valves are delivered to your facility with a certified zero-leakage guarantee under their designated working pressures (PN/Class).
Hassas Valf Service Overview
Frequently Asked Questions
Which types of industrial valves do you repair?
We provide comprehensive repair and overhaul services for Gate, Globe, Ball, Butterfly, and Check valves used in high-pressure lines. Our engineering team services both manual and actuator-driven valves across all pressure classes (ASME/DIN).
Can you repair large-scale valves without removing them from the pipeline?
Yes. For butt-welded valves or excessively large valves that are difficult to dismantle, we offer in-situ (on-site) machining and lapping services using portable precision equipment, which directly minimizes your facility's shut-down time.
What is your warranty policy and testing procedure for repaired valves?
Every valve repaired in our facility is subjected to rigorous hydrostatic and pneumatic sealing tests based on API 598 and EN 12266-1 standards. Valves that pass the test with a strict zero-leakage tolerance are officially certified and delivered with our operational guarantee.