Facility: Large Chemical Facility Southern, USA

Application Problem: Chemical Cooling Tower Service Water Loop System

Solution: DFT® Model ALC® Check Valve 10” 150/300# 316SS/316SS

Success Since: 2012

Challenge: A large Chemical Facility in the Southern United States, was experiencing extreme water hammer and pressure spikes with their cycling double door check installed in a cooling tower loop pump discharge application.This caused damage to the check valves and also damaged components around the check valves. The 10” double door valves being used at the time, had to be replaced every 6 months due to the cycling.

Solution: Three – 10”, 150/300# ALC Check valves replaced the worn double door check valves eliminating the water hammer and the valves have performed well since installation. The ALC check valves provided improved longevity and have been in place since 2012.

DFT ALC Check Valve for Water HammerDFT® Model ALC® Wafer Style Check Valve Features:

• 2” to 24” line size
• ASME class 150 and 300
• RF wafer ends
• API 594 face-to-face dimensions
• Standard Body Materials:
• A216 WCB carbon steel
• A351 CF8M stainless steel
• Stainless steel seat, disc & bushing
• Nitronic® 60 stem
• Inconel® X-750 spring
• Center-guided stem
• Spring assisted silent closing, non-slam
• Tight shutoff – lapped disc & seat
• Horizontal or vertical installation
• Protected spring
• Wafer and wafer-lug designs
• Axial Flow
• Nozzle style
• Easy maintenance

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