Quick Detail

Features

EMERGENCY STEM SEALANT INJECTION: This standard feature allows the valve’s stem housing to be adapted with a grease fitting to inject sealant during emergency scenarios, providing protection against unplanned spikes in operating conditions.

DRAIN AND VENT PORTS: Drain ports located at the bottom of the valve release any fluid trapped in the body cavity of a closed valve. Vent ports located at the top of the body cavity eliminate any gas trapped in the body cavity of a fully closed valve. Both play a key safety role in the double block and bleed and/or double isolation and bleed valve configurations.

FIRE SAFE DESIGN: Metal seat design provides a fire-safe shut off per API 607. Additionally,  graphite body seals and flexible graphite packing prevents leakage through the body joints and stuffing box, respectively.

ANTI-STATIC DEVICES: Standard anti-static devices ensure electrical continuity between the ball, stem, and body, eliminating the possibility of sparks within the valve created by static electrical charges.

VALVE POSITION INDICATION: Clear stamping on the outer diameter of the mounting flange identifies the open or closed position of the valve based on the stem key orientation.

BLOWOUT-PROOF STEM DESIGN: Valves are designed with stem/body connection preventing stem blowout under line pressure.

Technical Drawing

Reports

Documents can be used to prove how we control valve quality. Along with every order, Dervos will provide clients with an inspection report & a 3.1 mill test report for free.

In Dervos inspection report, you will see the actual results of dimension checking and pressure testing along with painting and packing picture. All these info are shown through data and clear pictures.

In 3.1 mill test report, we will show you the chemical composition, mechanical property and heat number for valve body, bonnet, stem, disc and so on.