Product Description

Wellheads, Refineries and Nuclear Facilities all utilize valves to provide flow containment and control. Within these assemblies, the stem packing is responsible for sealing dynamic stem movement while preventing leakage of pressurized working fluids to atmosphere. 
Given the safety, environmental, and equipment risks associated with stem leakage, sealing performance is subject to increasing scrutiny. Modern qualification standards demand repeatable performance under pressure cycling, thermal variation, and immersion exposure — conditions that challenge conventional packing technologies. 
This thermoplastic valve stem packing has been developed and certified to meet those demands.

Advanced Thermoplastic Architecture
Traditional packing technologies — such as graphite and U-cup configurations — have historically struggled to maintain sealing integrity across full PR2F cycling and temperature exposure. Low-temperature leakage and lifecycle degradation are recurring industry concerns.
The stem packing incorporates:

• PEEK and PTFE thermoplastic materials
• Dual springs improve initial seal energization and provide enhanced long-term reliability under pressure and thermal cycling. Incumbent designs commonly utilize a single spring configuration.
• High outer-diameter contact stress geometry: The outer diameter geometry increases static interface sealing robustness, supporting containment integrity at the packing cavity interface.