Class 600 LB Ball Valve Seat, Graphite, 218*228 mm, THK 17 mm

Product Name: Graphite Seat for Hard-Seal Ball Valve
Specification: 218 mm (ID) * 228 mm (OD) * 17 mm (Total Thickness)
Pressure Class: Class 600 LB
Testing Requirements: Hydrostatic & Pneumatic Sealing Performance
Material Properties:
Graphite Purity: ≥99 %
Metal Wire Content: 20 % (Inconel 600)
Sulfur Content: ≤50 PPM
Chlorine Content: ≤20 PPM

Benefits

Optimized V-ring angles ensure reliable, low-leakage sealing under both hydrostatic and pneumatic tests.
High-purity graphite with evenly distributed Inconel wire delivers excellent resilience and long service life.

Design Optimization Case

Original Customer Design: Three-ring, V-shaped composite structure with only a 5° angle difference between adjacent V-rings.
Issue Identified: A 5° angle mismatch creates poor sealing contact and high leakage risk.
Solution Proposed: Increased angle difference to 20° after explaining the graphite sealing mechanism to the customer.
Result: Customer approved the change; prototype testing confirmed excellent sealing performance.
Key Takeaway: We review every order from a valve-engineering perspective, proactively suggesting improvements to boost installation success and reduce customer costs rather than blindly following drawings.