Bypass Easy Riser; Check Valve With Bypass Trim - Viking ESFR Technical Data Manual

Page 40
March 7, 2008
ESFR PRE-PRIMED SINGLE
INTERLOCK PREACTION
TECHNICAL DATA
COLD STORAGE SYSTEM
The Viking Corporation, 210 N Industrial Park Road, Hastings MI 49058
Telephone: 269-945-9501 Technical Services 877-384-5464 Fax: 269-945-4495 Email: techsvcs@vikingcorp.com

8. Bypass Easy Riser

Check Valve with Bypass Trim

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A second Easy Riser Check Valve is required to be installed above the Primary Easy Riser
Check Valve. The Isolation Check Valve is identical to the Primary Easy Riser Check Valve, but
requires bypass trim.
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The bypass Easy Riser Check Valve is installed to "dead head" thermal transfer from a cold
area to a warm area or a warm area to a cold area in the case of installations in both coolers
and freezers. Frost is likely to occur on the piping downstream of the bypass Easy Riser Check
Valve. This piping and bypass check valve must be insulated with standard freezer insulation. In
situations where the valve is installed in the horizontal position, it must be installed with the face
plate facing up.
Figure 29 - Easy Riser Check Valve with Bypass Trim