High temperature ball valves
Some processes require valves able to be operated and to assure leakage rates within specified limits at high temperatures. In these cases we provide special valve design including extended bonnet (recommended for use at temperatures over 250°C), gaskets and seals and material selection suitable for high temperature service. For application where soft seats would be unsuitable, Tungsten Carbide (WC) or Chromium Carbide (CrC) coated metal ball and seats are used.
Heating to boiling points, catalytic and hydro-treatments are some of the refining processes necessary to separate crude oil into storable fractions like marketable oils and condensate; most of these processes at high temperature, from 121°C to 1100°C.
We can provide valves engineered to withstand and exceed high temperature applications with specific constructions and duly selected materials also suitable for geothermal applications, where the direct use of steam, hot water, with abrasive and highly corrosive chemicals and minerals could foul, erode, and damage standard equipment, offering unique features that make them an excellent choice for hot water (geothermal brine) and similar services.
What materials are recommended for high temperature ball valves?
For applications involving high temperatures, it is essential to utilize materials that can withstand extreme conditions. Recommended materials include Tungsten Carbide (WC) or Chromium Carbide (CrC) coatings for the ball and seats, which ensure durability and reliability when soft seats are unsuitable. Additionally, gaskets and seals should be selected specifically for high temperature service to prevent leakage.
What is the significance of an extended bonnet in high temperature ball valves?
An extended bonnet is recommended for use in high temperature applications (over 250°C) as it helps to maintain the temperature of the valve body, reducing the risk of thermal expansion issues and ensuring that the valve operates within specified leakage rates. This design feature is crucial for applications such as catalytic and hydro-treatments in refining processes.
How do high temperature ball valves contribute to refining processes?
High temperature ball valves play a significant role in refining processes by controlling the flow of fluids at elevated temperatures, such as during heating to boiling points. They are designed to ensure reliable operation and leak-free performance, which is critical for separating crude oil into storable fractions like marketable oils and condensate. This reliability is essential for maintaining process efficiency and safety.