610-497-2600

MODELS 19/19M/20/20M/20P/20MP/200A/200H LIQUID RELIEF VALVES

Features

• Inlet and outlet connections cast integral with body for easy inspection and servicing without disconnecting piping.
• Available with optional female NPT inlet or flanged inlet and outlet connections.
• Beveled seats lapped for optimum performance.
• Stainless steel spring for optimum corrosion resistance.
• Spherical pivot between disc and spring corrects misalignment and compensates for spring side thrust.
• Tested and inspected for pressure setting and leakage.

GENERAL APPLICATION

A range of valves suitable for overpressure relief and protection of pumps, tanks, lines and hydraulic systems; pressure regulation and continuous by-pass relief.

TECHNICAL DATA

Connections:Threaded NPT or flanged
Temperature range:-60° to 406°F (-51° to 208°C)
Pressure range1:1 to 500 psig (.07 to 20.7 barg)
NOTE
1. See specifications table.

MODELS OVERVIEW

Model 19: all bronze, equipped with handwheel for easy adjustment within spring ranges.
Model 19M: as model 19 except SS trim (seat and disc). Available in 2½” and 3″ only. For higher pressure settings or severe applications.
Model 20: all bronze, with pressure-tight cap. Suitable for maximum back pressure of 50 psig (3.45 barg).[1]
Model 20M: as model 20 except SS trim (seat and disc). Available in 2½” and 3″ only. For higher pressure settings or severe applications. Maximum back pressure of 50 psig (3.45 barg).[1]
Model 20P: as model 20 except with packed lift lever. Suitable for maximum back pressure of 50 psig (3.45 barg).[1]
Model 20MP: as model 20M except with packed lift lever. Maximum back pressure of 50 psig (3.45 barg).[1]
Model 200A: special non-chattering design. Recommended for light oils and continuousby-pass or pressure regulation. UL842 listed for light oil service. Available in ¾” to 1½” sizes. Female NPT connections only.
Model 200H: as model 20. UL842 listed for use with fuel oils. Available in ¾” to 2″ sizes.

OPTIONS

• Available with optional female NPT inlet or flanged inlet and outlet connections.
• Model 19
Variation 10: 5 to 75 psig (.34 to 5.17 barg) adjustable spring range.
Variation 11: 75 to 150 psig (5.17 to 10.34 barg) adjustable spring range.
Variation 12: 150 to 300 psig (10.34 to 20.7 barg) adjustable spring range.
•Models 19-D and 20-D
Variation 05: 50 to 150 psig (3.45 to 10.34 barg) spring range.
Variation 06: 100 to 300 psig (6.9 to 20.7 barg)spring range.

NOTE

1. Back pressure increases set pressure on a one to one basis and reduces capacity. Back pressure in excess of 10% of set pressure is not recommended.

PARTS AND MATERIALS

No.Part Name19, 19M20, 20M, 20P, 20MP, 200A, 200H
1Body1Bronze B62Bronze B62
2Stem retainerBrass B16Brass B16
3DiscBronze B584 Alloy 84400[2,3]Bronze B584 Alloy 84400[2,3]
4Spring stepBrass B16Brass B16
5O-ringPTFEPTFE
6SpringSS 316 or 17-7SS 316 or 17-7
7StemBrass B16Brass B16
8BonnetBronze B584 Alloy 84400Bronze B584 Alloy 84400
9Jam nutSteel A108 zinc platedBrass B16
10Compression screwBrass B16Brass B16
11CapN/ABrass, B16
12O-ringN/ANBR
13Drive screw6SS commercialSS commercial
14HandwheelIron A126 zinc plated5N/A

NOTES

1. Flanged connections optional.
2. Models 19, 20, 20P, 200H are brass, B283, Alloy 485, for ½”, ¾”, and 1”.
3. Models 19M, 20M, and 20MP are SS A743-CF8.
4. Model 200A is brass B16.
5. Bronze B584 Alloy 84400 for ½”, ¾”, 1¼”.
6. Not used on bonnet for 2½” and 3”.
MODELS 20, 200H WITH PRESSURE TIGHT CAP
MODEL 19, 19M
MODEL 200A

PARTS AND MATERIALS

No.Part NameMaterial
15Retainer washerSS PH15-7MO
16Stem endSS A582-303
17BallSS A756-440
18InsertSS A743 GR CF8
19O-ringPTFE
20Lift camSS A743-316
21Cotter pinSteel
22LeverSteel A108 zinc plated
23Drive screwSS Commercial
24Retainer camBrass B16
25O-ringNBR
26CapBronze B584 Alloy 84400
27Lift nutSteel A108
MODELS 19M, 20M AND 20MP 2½” SEAT CONFIGURATION
MODELS 19M, 20M AND 20MP 3” SEAT CONFIGURATION
MODELS 20MP AND 20P WITH LEVER

DIMENSIONS (inches)

Threaded150/300 flange
Valve modelABCDEF
1¼” Size
192⅝21/168⅛311/16311/169⅛
202⅝21/168⅛311/16311/168⅜
20P2⅝21/169311/16311/1610
200A2⅝21/167⅜---
200H2⅝21/167⅜311/16311/168⅝
1½” Size
19211/162⅛8⅝4⅛4⅛10⅛
20211/162⅛8⅝4⅛4⅛
20P211/162⅛4⅛4⅛10¾
200A211/162⅛7⅞---
200H211/162⅛7⅞4⅛4⅛
2” Size
19211/1610⅝11¼
20211/1610⅝10⅝
20P211/1612½13⅛
200H211/16915/161015/16
2½” Size
193⅞200H11⅛12
19M3⅞311⅛12¼
203⅞3101315/16
20M3⅞310139/16
20P3⅞312½15¾
20MP3⅞312½54¾161/16
3” Size
194⅝3⅞12¼5512⅝
19M4⅝3⅞12¼5513⅛
204⅝3⅞12¼5514¾
20M4⅝3⅞12¼5515⅛
20P4⅝3⅞14⅜5516⅞
20MP4⅝3⅞14⅜5517¼

Dimensions are for reference only

NOTES

1. All flanges rated per ANSI B16.24.
2. Standard with ¾” outlet – ½” outlet optional.
MODELS 19, 19M
MODELS 20, 20M, 200A, 200H
MODELS 20P, 20MP

SPECIFICATIONS

SizeMin/maxMin/maxApproximate
inlet/outletset pressure, (psig)[1]temperatureweight
NPT, (in)19, 20, 20P200A, 200H19M, 20M, 20MP(°F)(lb)
½[2]1/300-60/406
¾1/3001/200-60/406
11/3001/200-60/406
1/3001/200-60/4065
1/3001/200-60/406
21/3001/200-60/40611
1/3001/500-60/40616
31/3001/500-60/40625

DIMENSIONS (inches)

Threaded150/300 flange
Valve modelABCDEF
½” Size
1921⅝6⅛35/1635/167⅜
2021⅝5⅞35/1635/16
20P21⅝7⅜---
¾” Size
1921⅝6⅛35/1635/167⅜
2021⅝5⅞35/1635/16
20P21⅝7⅜35/1635/16
200A21⅝5⅞---
200H115/161⅝5⅞35/1635/167⅜
1” Size
191⅞7⅛37/1637/16
201⅞37/1637/167⅞
20P1⅞37/1637/16
200A1⅞---
200H1⅞611/1637/1637/168

Dimensions are for reference only

MODELS 19, 19M
MODELS 20, 20M, 200A, 200H
MODELS 20P, 20MP

NON-CODE LIQUID CAPACITY – 25% ACCUMULATION (GPM)

Set pressureValveinletandoutletsize
(psig)½”¾”1”1¼”1½”2”2½”3”
1124610193145
525814224268100
10371120315997141
204916284384137200
30511203453102168244
40613233961118193282
50715254468132216315
60716284875145237346
70817305281156256373
80819325587167274399
90920345992177290423
100921366297187306446
11010223765102196321468
12010233968106205335489
13011244171110213349509
14011254273115221362528
15011254476119229375546
16012264578123236387564
17012274781126244399582
18013284883130251410599
19013294986134258422615
20013295088137264433631
21014305290140271443646
22014315392144277454662
23014325494147284464677
24014325596150290474691

NOTE

1. Liquid overpressure factors
To determine capacities at other than 25% overpressure/accumulation, multiply capacity shown by:
10% acc. = 0.6
15% acc. = 0.8
20% acc. = 0.9

NON-CODE LIQUID CAPACITY – 25% ACCUMULATION (GPM)

Set pressureValveinletandoutletsize
(psig)½”¾”1”1¼”1½”2”2½”3”
25015335698153484705
260153458100156301493719
270153459102159307503733
280163560104162313512746
290163561106165318521760
300163662107168323530773
310------539785
320------547798
330------556810
340------564823
350------572835
360------580846
370------588858
380------596870
390------604881
400------612892
410------619903
420------627914
430------634925
440------642936
450------649946
460------656957
470------663967
480------670977
490------677987
500------684998

NOTE

1. Liquid overpressure factors
To determine capacities at other than 25% overpressure/accumulation, multiply capacity shown by:
10% acc. = 0.6
15% acc. = 0.8
20% acc. = 0.9

MODEL 200A ‘D’ – ¾”

Overpressure
psi25%50%75%100%
51.21.92.73.7
101.22.02.84.4
151.32.02.94.7
201.52.23.05.2
251.52.23.06.0
301.52.23.16.5
351.52.53.37.4
401.72.63.58.5
451.92.83.69.6
502.03.03.811.0
552.23.24.012.2
602.33.44.213.5
652.43.54.414.8
702.53.74.516.0
752.64.04.717.1
802.84.25.018.2
852.94.45.119.3
903.04.65.420.2
953.14.75.521.0
1003.14.85.721.4
1053.35.06.021.5
1103.45.16.121.4
1153.45.36.221.0
1203.55.56.420.5
1253.55.66.520.2
1303.55.86.719.8
1353.76.06.920.0
1403.76.17.020.2
1453.86.27.020.8
1503.86.37.221.5
1554.06.57.422.0
1604.06.57.522.9
1654.06.57.623.7
1704.06.67.824.6
1754.16.88.225.5
1804.26.98.526.8
1854.36.99.028.5
1904.47.010.030.5
1954.47.011.533.5
2004.57.012.936.2

MODEL 200A ‘E’ – 1”

Overpressure
psi25%50%75%100%
50.71.01.32.5
101.11.52.04.2
151.52.02.75.9
201.72.53.57.5
252.02.94.19.5
302.23.24.611.0
352.53.65.012.9
402.64.05.514.5
452.84.25.816.5
502.94.56.018.4
553.04.86.420.1
603.25.06.622.0
653.45.26.824.0
703.55.57.126.0
753.55.77.327.8
803.66.17.529.5
853.86.47.731.0
903.96.78.132.7
954.06.98.234.2
1004.17.08.535.5
1054.37.28.737.0
1104.47.49.038.0
1154.57.59.139.0
1204.57.69.239.8
1254.77.79.540.2
1304.87.89.640.5
1354.88.09.740.5
1404.98.09.840.1
1455.08.410.039.5
1505.08.510.038.3
1555.08.510.237.2
1605.18.710.436.0
1655.29.010.534.8
1705.49.210.833.7
1755.59.410.933.0
1805.59.511.033.0
1855.59.511.234.2
1905.49.511.337.5
1955.29.511.543.5
2005.09.511.648.8

MODEL 200A ‘F’ – 1¼”

Overpressure
psi25%50%75%100%
51.04.05.07.0
102.57.07.013.5
154.010.012.520.0
205.014.016.527.5
257.518.021.535.0
308.020.225.041.5
359.525.529.548.5
4010.027.033.554.5
4511.028.238.060.0
5011.830.042.566.5
5512.531.547.573.0
6013.033.052.079.0
6514.034.556.585.5
7014.836.061.092.0
7515.537.765.597.5
8016.239.069.5102.7
8517.040.073.0108.0
9018.041.076.0112.0
9518.542.078.0115.5
10017.542.078.5116.7
10516.541.077.5115.7
11015.539.574.5113.0
11514.537.570.5108.5
12013.535.066.0103.5
12512.533.762.799.8
13011.533.060.098.0
13510.533.560.599.0
14011.835.063.0103.0
14513.037.566.5109.0
15014.540.071.0116.0
15516.043.576.0123.7
16017.247.081.5132.0
16518.850.587.0140.0
17020.054.092.5148.0
17521.557.897.5155.5
18023.061.0102.0160.5
18524.063.5105.0163.0
19025.065.5106.0160.0
19526.267.5106.5153.5
20027.569.0106.8147.5

MODEL 200A ‘G’ – 1½”

Overpressure
psi25%50%75%100%
51.52.24.58.5
102.03.28.718.0
152.84.313.027.9
203.45.317.037.0
253.86.220.844.5
304.06.824.051.8
354.57.527.057.7
405.08.030.062.5
455.08.332.567.5
505.58.535.072.0
555.78.937.776.5
606.09.540.080.5
656.59.542.584.5
706.59.745.088.3
756.79.847.091.7
806.710.049.094.7
856.810.051.097.5
907.010.353.099.5
957.210.554.0100.6
1007.211.055.0100.3
1057.511.054.097.5
1107.511.353.093.0
1157.511.751.087.0
1207.511.849.080.5
1257.712.047.575.5
1307.912.046.873.0
1358.012.247.273.5
1408.012.248.777.0
1458.012.450.783.0
1508.012.453.090.0
1558.012.456.098.0
1608.012.459.0106.5
1658.012.562.3115.7
1708.012.765.5124.5
1758.013.069.0133.5
1808.514.073.0140.5
1859.015.877.0146.0
19010.019.082.5150.0
19511.823.589.0152.2
20013.527.795.5154.7

SELECTION GUIDE

Example:0019-F01-G0075
Model

0019    019M

0020     020M

020P    20MP

200A    200H
Inlet size

C     ½”  G     1½”

D      ¾”   H     2”

E     1”   J     2½”

F      1¼”   K     3”
Variation

See chart page
Design revision

Indicates non-interchangeable revision. Dash (-) if original design.
Spring material

G     316 SS

H      304 SS (only for Model 19M-K 300 psig or greater)
Set pressure

0005      5 psig

0025      25 psig

0400      400psig

Variation
½” Male x ¾” female½” Male x ½” female½” Female x ¾” femaleMale x female with gag½” Female x ½” female½” 150 Flg x ½” 150 Flg½” 300 Flg x ½” 150 FlgMale x femaleFemale x female (200A)Female x female150 Flg x 150 Flg300 Flg x 150 Flg (200H)300 Flg x 150 Flg150 Flg x 150 Flg (200H)¾” 300 Flg x ¾” 150 Flg (020P-D)Male x female (19-D, 20-D) 50 to 150 psigMale x female (19-D, 20-D) 100 to 300 psig
Model - inlet sizeInlet x outlet01020303040506101010203030404050506
19-C, 20-C, 20P-C½” x ½” (¾”)XXXXXX
19-D, 20-D¾” x ¾”XXXXXX
200A-D¾” x ¾”XX
200H-D¾” x ¾”XXX
19-E, 20-E, 20P-E21” x 1”XXXX
200A-E1” x 1”XXX
200H-E1” x 1”XXX
19-F, 20-F, 20P-F21¼” x 1¼”XXXX
200A-F1¼” x 1¼”XX
200H-F1¼” x 1¼”XXX
19-G, 20-G, 20P-G21½” x 1½”XXXX
200A-G1½” x 1½”XX
200H-G1½” x 1½”XXX
19-H, 20-H, 20P-H22” x 2”XXXXX
200H-H2” x 2”XXX
19-J, 19M-J, 20J, 20P-J, 20M-J, 20MP-J2½” x 2½”XXXX
19-K, 19M-K, 20-K, 20P-K, 20M-K, 20MP-K3” x 3”XXXX
20P-D¾” x ¾”XXXXX
WordPress Themes