Gate Valve Application
Derval gate valves are used as efficient shut-off valves with flow in either direction for water, saturated steam, air, gas, oil and crude oil products. They are utilized in applications where minimum pressure drop is necessary. Due to their specific design, gate valves should be operated in the full-open or full-close position. Concentrated flow across the seats of a partially opened gate valve risks possible seat damage, therefore throttling is not recommended. Operating parameters are in accordance with ASME B16.34 standard.
Gate Valve Installation
Derval gate valves are normally installed in horizontal pipe with vertical stem (handwheel up). The high-quality Derval valves are installed in a large variety of services in the Oil & Gas field, Chemical and Petrochemical industry, in On-shore and Off-shore drilling/refining, Power Generation, Water and Wastewater Treatment industries.