Product Overview

Materials
Series LF174A
•LeadFree*castcoppersiliconalloy
•Nonmetallicdisc-to-metalseating
Pressure – Temperature
Series LF174A
Pressure range: 50psi to 150psi (3 to 10 bar) with correspond-
ing high BTU/hr ratings from 950,000 to 14,370,000 BTU/hr.
Maximum Temperature: 250ºF (121ºC)
Standards
TestedandratedbytheNationalBoardofBoilerandPressure
Vessel Inspectors to the requirements of ASME. Meets Military
Spec. MIL-V-18634B, Type I, Class 3A, Style A (Bronze Body).
Dimensions – Weights
SERIES LF174A
Size (Dn) Height Length Weight
Model in. mm Model in. mm in mm lbs. kg.
LF174A
3
⁄4 x
3
⁄4 20 x 20 M3 4
1
⁄2 116 2
3
⁄4 67 1.2 0.5
LF174A 1 x 1 25 x 25 M1 5
3
⁄4 144 3 76 1.9 0.9
LF174A 1
1
⁄4 x 1
1
⁄4 32 x 32 M1 8
1
⁄2 213 4
1
⁄4 109 4.6 2.1
LF174A 1
1
⁄2 x 1
1
⁄2 40 x 40 M 9
1
⁄4 232 4
3
⁄4 122 6.9 3.1
LF174A 2 x 2 50 x 50 M 11
1
⁄2 290 6
1
⁄2 162 14.4 6.6
SERIES LF174A
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"
Pressure 20 x 20mm 25 x 25mm 32 x 32mm 40 x 40mm 50 x 50mm
psi bar Model M3 Model M1 Model M1 Model M Model M
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 3,325,000 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 13,390,000
150 10.34 2,445,000 3,795,000 6,340,000 7,630,000 14,370,000
Capacity*
BTU/hr Steam Pressure Discharge Capacities
As tested and rated by the National Board of Boiler and
Pressure Vessel Inspectors
ES-LF174A 1413 ©2014Watts
USA:Tel:(978)688-1811•Fax:(978)794-1848•www.watts.com
Canada:Tel:(905)332-4090•Fax:(905)332-7068•www.watts.ca
A Watts Water Technologies Company