10
Figure 4-2 - Safety Relief Valve
4.2 Safety Relief Valve Installation
See Figure 4-2
Check local codes
for maximum
distance from floor
or allowable safe
point of discharge.
Discharge Line
Safety Relief Valve
Discharge line shall be installed to relief valve outlet
connection to avoid burns, scalding, or water damage due
to discharge of steam and/or hot water during operation.
Discharge line shall:
A. connect to relief valve outlet and piped down to safe
point of disposal. Check local codes for maximum
distance from floor or allowable safe point of
discharge.
B. be of pipe size equal to or greater than that of
the relief valve outlet over the entire length of
discharge line;
C. have no intervening shutoff valve between safety
relief valve and discharge to atmosphere (do not
plug or place any obstruction in discharge line.
D. terminate freely to atmosphere where any discharge
will be clearly visible and at no risk of freezing;
E. allow complete drainage of the valve and the
discharge line;
F. be independently supported and securely anchored
to avoid applied stress on the relief valve;
G. be as short and straight as possible;
H. terminate with plain end (not threaded);
I. be constructed of material suitable for exposure to
temperatures of 375° F (191°C); or greater.
Refer to local codes and appropriate ASME Boiler
and Pressure Vessel Code for additional installation
requirements.
Alternate Location
Piped in Supply
Line (Contractor
Supplied Fittings)
WARNING
Burn and scald hazard. Safety relief valve shall be
installed with spindle in
upright position only
,
following ASME BPV code. Failure to follow these
instructions could result in death or serious injury.
!
Do Not Install
Pressure
Relief Valve
Horizontally
WARNING
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions. Failure
to follow these instructions could result in death or
serious injury.
!
4 - CONNECTING SUPPLY & RETURN PIPING
Figure 4-3 Optional Locations for Drain Valve
Left Side Drain
Valve Location With
Standard
Manufacturer
Supplied Hardware
Optional Right side
Drain Valve Location
with Contractor
Supplied Tee
Gas Valve Location
Connection
PN 240012809, Rev. D [08/15/2021]
