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Table 14: Fitting and Valve Equivalent Length
Copper Fitting and Sweat Valve
Equivalent Length (Ft)
Fitting or Valve
Description
Copper Pipe or Valve Size
1
1¼
1½
2
90° Elbow
2.5
3.0
4.0
5.5
45° Elbow
1.0
1.2
1.5
2.0
Tee (through flow)
0.5
0.6
0.8
1.0
Tee (Branch flow)
4.5
5.5
7.0
9.0
Diverter Tee (typical)
23.5
25.0
23.0
23.0
Gate Valve
0.3
0.4
0.5
0.7
Globe Valve
25.0
36.0
46.0
56.0
Angle Valve
5.3
7.8
9.4
12.5
Ball Valve (standard port)
4.3
7.0
6.6
14.0
Ball Valve (full port)
1.9
1.4
2.2
1.3
Swing Check Valve
4.5
5.5
6.5
9.0
Flow-Check Valve
(typical)
54.0
74.0
57.0
177.0
Butterfly Valve
2.7
2.0
2.7
4.5
Threaded Fitting and Valve Equivalent Length (Ft)
Fitting or Valve
Description
Black Threaded Pipe or
Valve Size
1
1¼
1½
2
90° Elbow
2.6
3.5
4.0
5.2
Long Radius
Elbow (45° or 90°)
1.4
1.8
2.2
2.8
Tee (through flow)
1.8
2.3
2.7
3.5
Tee (Branch flow)
5.3
6.9
8.1
10.0
Close Return Bend
4.4
5.8
6.7
8.6
Gate Valve (full open)
0.7
0.9
1.1
1.4
Globe Valve (full open)
30.0
39.0
46.0
59.0
Angle Valve (full open)
13.0
17.0
20.0
26.0
Swing Check Valve
(full open)
8.7
12.0
13.0
17.0
Flow-Check Valve
(typical)
42.0
60.0
63.0
83.0
Table 14: Fitting and Valve Equivalent
Length (continued)
NOTE:
Table 14 is provided as reference to assist in piping design and specifies equivalent length of typical piping fittings and
valves.
VI. Water Piping and Trim
(continued)
6. Manual Reset High Limit (Required by some
Codes)
–
This control is required by ASME
CSD-1
and some other codes. Install the high limit in
the boiler supply piping just above the boiler
with no intervening valves. Set the manual
reset high limit to 200°F. Wire the limit per
Figures 27 and 28 in Section VIII Electrical.
7. Flow Control Valve (Strongly Recommended)
–
The flow control valve prevents flow through
the system unless the circulator is operating.
Flow control valves are used to prevent gravity
circulation or “ghost flows” in circulator zone
systems through zones that are not calling for
heat.
8. Y-strainer (Recommended)
–
A Y-strainer or
equivalent strainer removes heating system
debris from hydronic systems and protects
boiler heat exchanger from fouling up. Install
the strainer downstream of full port isolation
valve, at the inlet side of the circulator, for easy
service.
9. Isolation Valves (Strongly recommended)
–
Isolation valves are useful when the boiler must
be drained, as they will eliminate having to
drain and refill the entire system.
10. Drain Valve (Required)
–
Drain valve is
packaged loose with boiler and must be
installed in the location shown in Figure 20
“Factory Supplied Piping and Trim Installation”
of the Installation, Operating and Service
Instructions.
11. Low Water Cutoff.
A hot water boiler installed
above radiation level, or as required by the
Authority having Jurisdiction, must be provided
with a low water cutoff device at time of boiler
installation.
a. Automatic Reset LWCO with harness, Part
Number 100592-01.
• Install as shown in Figure 21, 22, 24B or
25B.
• Wire using harness provided with low
water cutoff per Figures 27 and 28.
b. Manual Reset LWCO, Part Number
80160718.
• Install as shown in Figure 21, 22, 24B or
25B.
• Wire with field-sourced wiring per
Figures 27 and 28.
Содержание Alpine ALP080B
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Страница 77: ...103448 10 6 18 77 VIII Electrical continued Figure 27 Wiring Connection Diagram...
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Страница 82: ...82 103448 10 6 18 VIII Electrical continued Figure 29D Boiler to Boiler Communication with Zone Panel...
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Страница 148: ...148 103448 10 6 18 U S Boiler Company Inc P O Box 3020 Lancaster PA 17604 1 888 432 8887 www usboiler net...
