Silent Check Valves
Catalog 800

These unique CPV valves control hazardous pressure surges and water hammer far more effectively than traditional swing check valves.  A specially engineered stainless steel helical spring initiates instant closing at zero flow velocity.  Since swing check valves do not close until reverse flow begins, pressure surges are never allowed to build.   CPV Silent Check Valves are available with precision machined metal-to-metal seats for general service or soft seats for bubble tight sealing to 250°F (121°C).

Silent Check Valves are available in a wide variety of styles and materials, in sizes from ½” NPT to 24” flanged and pressure ratings from 125 to 2500 psi. 

CPV Silent Check Valves are ideal for applications like heating systems and condensate return lines with pressures to 300 psi.  They come with a soft seated closure disc as standard to 250°F (121°C).  A stainless steel disc can be substituted if anticipated temperatures are up to 350°F (177°C).  Other available options include the use of bronze for the body, union nut and tail piece; a stainless steel guide, retaining ring and spring (Catalog 36), steel body and stainless steel disc (Catalog 34) or all stainless steel, type 18-8 (Catalog 37)  Sizes are from ½” to 2” NPT.

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Silent Check Valves		Catalog No.	Page
	Overview	-	2-5
	Universal Application	-	6-7
	Engineering Data	-	18
	Material Specifications	-	19
	Temperature Ratings	-	19
Silent Check Valves
2" to 8" 125 to 300 psi ANSI		-	8-9
3" to 24" 125 and 250 psi ANSI		.-	10-11
1/2" to 2" Screwed End union Body 300 psi		-	11
2"-12" 150 to 2500 psi ANSI		-	12-13
Silent Air Check Valves
2" to 8" 125 to 300 psi ANSI		-	14-15
Positive Reseating Relief Valves
200 psi - for temperatures to 250° F		-	16