September 2022

Rising stem valves provide a stem that rises or falls as the valve opens or closes. In this article, we will review a rising stem gate valve, a rising stem ball valve, a rising stem globe valve, and compare the rising stem valve vs. its non-rising counterpart.

The design of pressure seal valves is specifically for high-pressure applications typically in excess of 1,000 psi and are therefore normally only available in pressure classes of 600# and above. In this article, we will discuss how the pressure seal valve works, the pressure seal bonnet vs. bolted bonnet design, and pressure seal gaskets.