10
4 - CONNECTING SUPPLY AND RETURN PIPING
Figure 4-2 - Safety Relief Valve
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.
!
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:
4.2 Safety Relief Valve Installation
See Figure 4-2
Check local codes for maximum
distance from floor or allowable
safe point of discharge
.
RELIEF VALVE
On Opposite
side of supply
DISCHARGE
LINE
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.
!
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.
J. Terminate freely to atmosphere where discharge is
clearly visible and no risk of freezing.
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)
Do Not Install
Pressure
Relief Valve
Horizontally
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
PN 240013268 Rev. D [08/15/2021]
