Ace Heating Solutions Mini-Pack, Инструкция по эксплуатации и техническому обслуживанию

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DIMENSIONS - WEIGHTS MA
TERIALS
Series 174A
•
Bronze body construct
i
on
•
Non
m
etall
i
c d
i
sc-to-
m
etal seat
i
ng
Series 740
•
Iron body construct
i
on
•
Non
m
etall
i
c d
i
sc-to-
m
etal seat
i
ng
PRESSURE - TEMPERA
TURE
Series 174A Pressure range: 30 ps
i
to 150 ps
i
(2 to 10 bars) w
i
th
correspond
i
ng h
i
gh BTU/hr rat
i
ngs fro
m
650,000
to 14,370,000 BTU/hr
.
Max
im
u
m
Te
m
perature: 250
°
F (121
°
C)
.
No. 374A Pressure range: rated up to 550,000 BTU/hr at a 30 ps
i
(2 bars) sett
i
ng only
.
Series 740 Pressure range: 30 PSI to 75 ps
i
(2 to 5 bars) w
i
th cor-
respond
i
ng h
i
gh rat
i
ngs fro
m
925,000 to 10,700,000
BTU/hr
.
Max
im
u
m
Te
m
perature: 250
°
F (121
°
C)
.
ST
ANDARDS
Tested and rated by A
.
S
.
M
.
E
.
Nat
i
onal Board of Bo
i
ler
and Pressure Vessel Inspectors
.
Meets M
i
l
i
tary Spec
.
MIL-V-18634B, Type I, Class 3A,
Style A (Bronze Body), Style B (Iron Body)
.
CAP
ACITY
ES-174A-740 0026
© Watts Regulator Co
.
, 1998
Pr
i
nted
i
n U
.
S
.
A
.
USA
:
815 Chestnut St., No. Andover
, MA 01845-6098; www
.wattsre
g
.com
C
anada
:
5435 North Ser
vice Rd., Burlin
g
ton, ONT
. L7L 5H7; www
.wattscda.com
HV
NB
ASME
Size (Dn)
Height
Length
Weight
No.
in.
mm
Model
in.
mm
in .
m
m
lbs.
kg.
374A
3
⁄
4
x
3
⁄
4
20 x 20
–
3
5
⁄
8
92
2
1
⁄
2
64
1.13
.5
174A
3
⁄
4
x
3
⁄
4
20 x 20
M3
5
1
⁄
8
130
2
1
⁄
2
64
1.50
.7
174A
1 x 1
25 x 25
M1
5
3
⁄
4
146
3
7
6
3.13
1.4
174A
1
1
⁄
4
x 1
1
⁄
4
32 x 32
M1
8
3
⁄
8
213
4
3
⁄
4
121
6.25
2.8
174A
1
1
⁄
2
x 1
1
⁄
2
40 x 40
M
9
229
4
7
⁄
8
124
7.25
3.3
174A
2 x 2
50 x 50
M
1
1
5
⁄ 8
295
6
1
⁄
4
159
13.75
6.2
Series 740
740
3
⁄
4
x 1
20 x 25
M1
5
5
⁄
8
143
3
7
6
1.88
.9
740
1 x 1
1
⁄
4
25 x 32
M
7
1
⁄
4
184
3
1
⁄
2
89
3.13
1.4
740
1
1
⁄
4
x 1
1
⁄
2
32 x 40
M
8
3
⁄
4
222
4
5
⁄
8
117
6.13
2.8
740
1
1
⁄
2
x 2
40 x 50
M
9
1
⁄
4
235
5
1
⁄
4
133
7.50
3.4
740
2 x 2
1
⁄
2
50 x 65
M
1
1
5
⁄ 8
295
6
3
⁄
4
171
16.50
7.5
Series 174A
BTU/hr Steam Pressure Discharge Capacities
As tested and rated by the Nat
i
onal Board of Bo
i
ler and Pressure Vessel Inspectors
Set
3
⁄
4
" x
3
⁄
4
"
1" x 1"
1
1
⁄
4
" x 1
1
⁄
4
"1
1
⁄
2
" x 1
1
⁄ 2
"
2" x 2"
P
ressure
20 x 20mm
2
5
x 2
5
mm
32 x 32mm
40 x 40mm
5
0 x
5
0mm
p
si
bars
Model M3
Model M1
Model M1
Model M
Model M
30
2.07
650,000
1,005,000
1,682,000
2,020,000
3,815,000
33
2.27
695,000
1,075,000
1,788,000
2,150,000
4,080,000
35
2.41
725,000
1,125,000
1,877,000
2,250,000
4,250,000
36
2.48
740,000
1,145,000
1,916,000
2,310,000
4,344,000
40
2.76
800,000
1,240,000
2,071,000
2,490,000
4,690,000
45
3.10
875,000
1,355,000
2,265,000
2,720,000
5,130,000
50
3.45
950,000
1,470,000
2,459,000
2,950,000
5,575,000
55
3.79
1,025,000
1,590,000
2,653,000
3,190,000
6,010,000
60
4.13
1,100,000
1,702,000
2,847,000
3,425,000
6,450,000
65
4.58
1,170,000
1,820,000
3,041,000
3,660,000
6,890,000
70
4.82
1,245,000
1,935,000
3,235,000
3,890,000
7,330,000
75
5.17
1,320,000
2,055,000
3,429,000
4,125,000
7,770,000
80
5.51
1,400,000
2,166,000
3,605,000
4,360,000
8,215,000
85
5.86
1,470,000
2,285,000
3,817,000
4,590,000
8,650,000
90
6.60
1,545,000
2,400,000
4,011,000
4,825,000
9,090,000
95
6.55
1,620,000
2,520,000
4,205,000
5,060,000
9,530,000
100
6.89
1,695,000
2,635,000
4,399,000
5,290,000
9,970,000
105
7.23
1,770,000
2,750,000
4,593,000
5,525,000
10,410,000
110
7.58
1,845,000
2,865,000
4,787,000
5,760,000
10,850,000
115
7.92
1,920,000
2,980,000
4,981,000
5,990,000
11,290,000
120
8.27
1,995,000
3,100,000
5,175,000
6,225,000
11,730,000
125
8.61
2,070,000
3,215,000
5,370,000
6,460,000
12,170,000
130
8.96
2,145,000
3,330,000
5,564,000
6,690,000
12,610,000
135
9.30
2,220,000
3,445,000
5,758,000
6,925,000
13,050,000
140
9.65
2,295,000
3,565,000
5,952,000
7,160,000
13,490,000
145
9.99
2,370,000
3,680,000
6,146,000
7,390,000
13,930,000
150
10.34
2,445,000
3,795,000
6,340,000
7,630,000
14,370,000
Series 174A
Set
3
⁄
4
" x 1"
1" x 1
1
⁄
4
"1
1
⁄ 4
" x 1
1
⁄
2
"1
1
⁄
2
" x 2"
2" x 2
1
⁄
2
"
P
ressure
20 x 2
5
mm
2
5
x 32mm
32 x 40mm
40 x
5
0mm
5
0 x 6
5
mm
p
si
bars
Model M3
Model M1
Model M1
Model M
Model M
30
2.07
925,000
1,300,000
2,105,000
2,900,000
5,250,000
33
2.27
989,000
1,390,000
2,250,000
3,100,000
5,613,000
35
2.41
1,032,000
1,450,000
2,345,000
3,235,000
5,855,000
36
2.48
1,053,000
1,480,000
2,395,000
3,300,000
5,975,000
40
2.76
1,139,000
1,600,000
2,590,000
3,569,000
6,461,000
45
3.10
1,245,000
1,750,000
2,830,000
3,903,000
7,067,000
50
3.45
1,352,000
1,899,000
3,075,000
4,237,000
7,672,000
55
3.79
1,459,000
2,049,000
3,315,000
4,572,000
8,277,000
60
4.13
1,566,000
2,200,000
3,560,000
4,907,000
8,883,000
65
4.58
1,672,000
2,349,000
3,800,000
5,241,000
9,488,000
70
4.82
1,779,000
2,499,000
4,045,000
5,575,000
10,093,000
75
5.17
1,886,000
2,649,000
4,285,000
5,909,000
10,700,000
Series 740
Series 174A-740
ASME W
ater
P
ressure
Relief V
alves
for Pr
essur
e Pr
otection of
Hot W
ater Heating Boilers
S
i
zes:
3
⁄
4
" thr
ough 2" (20 - 50
mm
)
Series 174A Bronze body safety rel
i
ef valves for pressure protect
i
on only
of all types of hot water heat
i
ng bo
i
ler equ
i
p
m
ent
.
Pressure
range 30 to 150 ps
i
(2 - 10 bars) w
i
th correspond
i
ng h
i
gh rat-
i
ngs fro
m
650,000 to 14,370,000 BTU/hr
.
Fe
m
ale
i
nlet and
outlet connect
i
ons
.
S
i
zes
3
⁄
4
" to 2" (20 to 50
mm
)
.
Series 374A Iron body w
i
th forged bronze
i
nlet, 550,000 BTU/hr rat
i
ng
.
S
i
ze
3
⁄ 4
" (20
mm
) only
.
Series 740 Iron body w
i
th expanded outlets for hot water space heat
i
ng
bo
i
lers
.
Pressure range 30 to 75 ps
i
(2 to 5 bars) w
i
th corre-
spond
i
ng h
i
gh rat
i
ngs fro
m
925,000 to 10,700,000 BTU/hr
.
FEA
TURES
•
Seat located above drain; water can’t be trapped and sediment can’t foul seat.
•
Non-mechanical seat-to-disc alignment will not stick or freeze.
•
Water seal of high temperature resisting material isolates spring working parts from water during relief.
SPECIFICA
TIONS
Boiler Relief Valves An ASME Sect
i
on IV cert
i
f
i
ed pressure rel
i
ef valve shall be
i
nstalled on each bo
i
ler as noted
.
The valve shall have a
BTU rat
i
ng
i
n excess of the BTU rat
i
ng of the bo
i
lers heat-
i
ng output
.
Each hot water space heat
i
ng bo
i
ler shall be
equ
i
pped w
i
th a pressure rel
i
ef valve set to rel
i
eve below
the
m
ax
im
u
m
bo
i
ler work
i
ng pressure
.
The valve shall fea-
ture a ra
i
sed seat and non-
m
echan
i
cal d
i
sc al
i
gn
m
ent
.
Work
i
ng parts and spr
i
ng shall be
i
solated fro
m
any d
i
s-
charge by a h
i
gh te
m
perature res
i
stant
m
ater
i
al
.
Valve shall
be a Watts 174A or 740 Ser
i
es
.
ES-174A-740
OPERA
TION
As ther
m
al expans
i
on cond
i
t
i
ons develop, pressure bu
i
lds up
to the sett
i
ng of the rel
i
ef valve
.
Th
i
s w
i
ll cause d
i
scharg
i
ng of
s
m
all quant
i
ty of
water
.
Should operat
i
ng controls fa
i
l, per
mi
tt
i
ng runaway f
i
r
i
ng, the
bo
i
ler water
m
ay reach stea
m
te
m
peratures
.
The valve w
i
ll
then open to d
i
scharge
steam
at the rate or faster than the
bo
i
ler can generate
i
t, thus restor
i
ng syste
m
pressure to a
safer level
.
Important
: The d
i
scharge l
i
ne
m
ust be the sa
m
e s
i
ze as the
valve outlet, and
m
ust p
i
tch downward fro
m
the valve to a
safe place for d
i
sposal
.
Valve lever
m
ust be tr
i
pped at least once a year to
i
nsure that
waterways are clear
.
T
h
i
s dev
i
ce
i
s des
i
gned for e
m
ergency
safety rel
i
ef and shall not be used as an operat
i
ng control
.
Series 174A
Series 740
For Hot W
ater Boiler Applications
Job Na
m
e
Contractor
Job Locat
i
on
Approval
Eng
i
neer
Contractor’s P
.
O
.
No
.
Approval
Representat
i
ve
W
atts pr
oduct spec
i
f
i
cat
i
ons
i
n U
.
S
.
custo
m
ary un
i
ts and
m
etr
i
c
ar
e appr
ox
im
ate and ar
e pr
ov
i
ded for r
efer
ence only
.
W
atts r
e
-
serves the r
i
ght to change or
m
od
i
fy pr
oduct des
i
gn, construct
i
on,
spec
i
f
i
cat
i
ons, or
m
ater
i
als w
i
thout pr
i
or not
i
ce and w
i
thout
i
ncur
-
r
i
ng any obl
i
gat
i
on to
m
ake such changes and
m
od
i
f
i
cat
i
ons on
W
atts pr
oducts prev
i
ously or subsequently sold
.