Non SlamCheck Valve Nozzle Bolted 300lb Pipline Valve

EDVC No-slam check valves are silent in-line and specifically designed to automatically protect critical components from reverse flow as well as pressure transients. Fast and prompt closing is assured due to the powerful spring and short valve stroke. As forward velocity begins to slow, the spring assist starts to close the disc. By the time it reaches zero, the valve disc is closed against the seat before reverse flow can occur, preventing a peak of pressure in the line and water hammer phenomena.
In addition, Velan ABV offers a compact version of No-slam check valves, providing the same reliability and quality of the traditional No-slam valves, but with significant space and weight savings.

VALVE DESIGN     
based on API 6D and customer requirements
based on API 6A and customer requirements

Product Specification:

SIZE: NPS 2 - 56 (DN 50-1400)/ NPS 1.13/16- 21.1/4 (DN 46-540)

TEMPERATURE RANGE: -150 to 662°F (-101 to 350°C)

PRESSURE RATING: ASME 150 - ASME 2500/ API 5000-API 15000

OPERATOR: automatic

Design Feature:

FACE-TO-FACE:
As per API 6D standard/As per API 6A standard

END CONNECTIONS:
RF, RTJ as per B16.5 &B16.47
BW, Butt Welded as per B16.25
Hub connection
6B, 6BX as per API6A

BODY DESIGN: 
Cast one-piece / bolted two pieces for size >20 inch.
Forged bolted one-piece/ three-piece 

SEAT DESIGN: 
Metal-seated with hard facing on disk and seat

FEATURES:

Powerful spring for ultra-fast closing action
Venturi pattern design
Minor friction between moving parts to eliminate any chance of jamming
Spring assisted and short stroke
No chattering effects to minimize pressure fluctuation during normal conditions
Low pressure drop
High dynamic response and zero reverse flow
Nozzle design if the valve size>20 inch. for better flow regulation
Short pattern design compact face-to-face option for weight and space savings

ADVANTAGE:

      One of the primary advantages of non-slam check valves is their ability to effectively prevent water hammer, and, therefore, eliminate resultant pressure swings, vibrations, and damage.Non-slam valves have a short stroke, which facilitates soft closing quickly in the event of rapidly reduced flow to prevent water hammer. Because they feature only one moving part, the disc itself, non-slam check valves experience minimal wear over time. In many designs, the spring is also fully protected from the process flow. Together, these factors help to greatly extend the service lives of non-slam check valves over more traditional valves. Non-slam check valves’ extended lifespan and reduced maintenance requirements ultimately allow for greatly reduced operational costs, which mean a lower cost of ownership over the full life cycle of the part.

DISADVANTAGE:

Non-slam check valves’ main disadvantage is that they cannot be used where line cleaning maintenance requires line “pigging.”A piggable valve is essentially a valve that allows a pipeline pig can pass through it. The valve has a bore the same size as the pipeline that it is attached to; there are no obstructions when fully opened.