A. Special Design Features
- 1. PARVEEN valve bodies are made from alloy steel forgings which are designed to variety of end connections to be integrally machined.
- 2. PARVEEN plug and inserts are designed to resist abrasion and corrosion.
- 3. PARVEEN valves can be easily adopted for hydraulic or pneumatic actuation. These configurations are designed for integration with complete manifold systems.
- 4. We manufacture in compliance with API-6A & API-Q1.
- 5. Our range is up to 15000 PSI WP.
B. Operating Principle
- 1. The plug rotates 90° (1/4 turn) for rapid full open or close operation. This reduces erosion due to throttling action.
- 2. To ensure a uniform clamping action for the initial pressure seal, the valve body is tapered.
- 3. To ensure a continuous seal becoming more effective as’ differential pressure increases, the plug and inserts “float” downstream with pressure differential caused by the initial seal.
- 4. Relationship between the seal and the bearing areas is such that the torque required to operate the valve is minimized.
- 5. To eliminate the need for thrust bearing to reduce friction, the plug is balanced by identical stem seals.
