Switching valve design focuses on operational reliability, extended mean time before overhaul and reduced total cost of ownership.

The delayed coking process is a batch process and one of the harshest environments in a refinery – due to the abrasive and high temperature reactions of the coke byproducts. Valves are frequently cycled and failures can result in a complete unit shutdown, resulting in significant process and financial costs. Optimizing valve lifecycle is critical to operational efficiency.

Bellville loaded seats and balls maintain valve operability between shutdown intervals

Switching valves with tight shutoff facilitate reliable drum operation

Spring pockets are protected by Chevron and Grafoil seals to prevent coke buildup and lockup in the event of a steam event

Chromium carbide coated ball and seat surfaces extend service life and reduce repair costs

High-strength metal pressure seal ring bonnet seals to prevent leakage to atmosphere under severe operating conditions

Continuous cavity cleaning design eliminates multiple coke buildup and lockup

Chesterton low-emission stem packing exceeds emission guidelines

Flanged end connections available