Mark 50 Series: Self-Operated Back Pressure Regulators
Mark 50 Series: Self-Operated Back Pressure Regulators
Mark 50 Series: Self-Operated Back Pressure Regulators
Mark 50 Series
Self-Operated Back Pressure Regulators
The Mark 50 Sliding Gate Back Pressure Regulator
is used to regulate upstream pressure at a predetermined setpoint. The spring in the Mark 50 holds the
sliding gate seats in their normally closed position.
MK50: a line of self-operating back pressure regulators designed with Jordan Valves sliding gate
seats.
MK51: The MK51 features a larger diaphragm
than a standard MK50 to provide even greater
sensitivity and more accurate regulation of your
required setpoint.
MK50QC: The MK50QC features a Quick
Change dome for simple range spring replacements. Ideal for facilities with multiple back pressure requirements as it is possible to stock one
valve with several spare springs to cover a wide
range of needs.
MK50H: The MK50H features a handwheel that
is mounted on the adjusting screw to allow easy
setpoint changes.
MK50HP: The MK50HP option is an elongated
spring housing that features a large spring for
high pressure setpoints up to 450 psi (31,03
bar).
MK50GP: The MK50GP option is used in grain
processing for starch cookers and other viscous
services.
MK50CR: The MK50CR option has a special
spring housing for use if the valve is in cryogenic
services.
MK501/502: The MK501 and MK502 meet higher
capacity requirements than standard back pressure regulators.
Mark 50 Features
Sliding Gate Trim unique seat design for unsurpassed trim life and accuracy.
Jorcote Seat Coating ceramic composite for
liquids, gases and especially steam. Very low
friction with outstanding wear resistance and a
temperature rating of up to 550F (288C). Steam
tested to 1,000,000 cycles and still maintained
Class IV leakage.
Jorlon Diaphragm extremely durable, virtually
universally applicable up to 450F. Tested without
failure to over 1,000,000 full stroke cycles. Ideal
for steam, gases and liquids. 316SST diaphragm
applicable up to 650F.
Straight-through Flow The flow is straight
through the valve seats and body. Direction of the
disc travel is perpendicular to the flow, not opposed to the direction of the flow. Thus, the flow
does not unbalance the seats. The MK50 can use
a wider range of its stroke to give accurate control; less offset and rangeability up to 20:1.
Quiet Operation typically 5-10 dB less than
conventional globe style regulators. The disc
and plate are always in contact, which eliminates
chattering. Straight-through flow minimizes turbulence. Multiple orifices in the plate and disc divide
the flow stream into smaller flow components.
Minimum Maintenance The MK50 sliding
gate seats require no special tools for disassembly. The seats are pre-lapped at the factory and
are self-lapping while in operation ensuring a
continual tight shutoff.
Jordan Valve, a division of Richards Industries
3170 Wasson Road Cincinnati, OH 45209
513.533.5600 800.543.7311 513.871.0105 (f)
info@richardsind.com www.jordanvalve.com
The upstream pressure is sensed beneath the diaphragm. (A sensing line is required on sizes:
2-1/2", 3", and 4"). As the upstream pressure exceeds
the setpoint, pressure is exerted on the diaphragm
which raises the stem to modulate the disc (the movable component of the sliding gate seat set) toward the
open position. As the seats open, upstream pressure
will be regulated to the required setpoint. A decrease
in pressure relaxes the spring and diaphragm to move
the seats toward the closed position.
Mark 50 Series
Ideal for gas and liquids
Superior for steam
Internal sensing
simplifies installation,
improves response
time
-2-
Specifications MK50/50QC/51/50HP
Sizes: (1/4" & 3/8" sizes use 1/2" body with reducers)
Mark 50: 1/4" through 4" (DN8 through DN100)
Mark 50QC: 1/4" through 2" (DN8 through DN50)
Mark 51: 1/4" through 3/4" (DN8 through DN20)
Mark 50HP: 1/4" through 4" (DN8 through DN100)
Seat Materials:
Jorcote on SST Standard
Other materials available Consult factory
Diaphragm Materials:
Stainless Steel Standard on 1/4" - 2" (DN8-DN50)
Buna-N Standard on 2-1/2" - 4" (DN65-DN100)
Jorlon On steam service 2-1/2" - 4" (DN65-DN100)
See page 12 of this brochure for details.
Viton Optional
End Connections:
Threaded FNPT, BSPT, BSPP (1/2" - 2" only,
DN15-DN50)
ANSI Flanges (150#, 300#, 600#)
DIN Flanges (PN10/16, PN25/40)
JIS Flanges (upon request)
Spring Housing:
Ductile Iron 1/4" - 2" (DN8 - DN50)
Ductile Iron 2-1/2" - 4" (DN65 - DN100)
Body Materials:
Ductile Iron
Bronze (1/2" - 2", DN15-DN50)
Cast Iron (2-1/2" - 4", DN65-DN100)
Carbon Steel (A216 WCB)
Stainless Steel (A351/CF8M)
Trim Materials:
303SST Standard on Ductile Iron, Bronze,
Carbon Steel valves
316SST Standard on Stainless Steel valves
Monel, Hastelloy and other Alloys available
Pressure Control Ranges: Select a range to match
your setpoint. For optimal performance, your setpoint
should fall in the upper portion of the selected range.
Model
Size (DN
1/4" - 3/4"
(DN8 - DN20)
50 & 50QC
1" - 2"
(DN25 - DN50)
2-1/2" - 4"
(DN65- DN100)
50HP
1/2" - 2"
(DN15 - DN40)
2-1/2" - 4"
(DN65 - DN100)
51
1/4" - 3/4"
(DN8 - DN20)
Spring Ranges
PSI
BAR
2 - 20
0,14 - 1,38
10 - 30
0,69 - 2,07
20 - 45
1,38 - 3,10
30 - 135
2,07 - 9,31
80 - 185
5,52 - 12,76
1/2 - 4
0,03 - 0,28
2-6
0,14 - 0,41
4 - 13
0,28 - 0,90
8 - 20
0,55 - 1,38
15 - 80
1,03 - 5,52
45 - 150
3,10 - 10,34
4 - 15
0,28 - 1,03
7 - 24
0,48 - 1,65
16 - 30
1,10 - 2,07
75 - 190
5,17 - 13,10
100 - 320
6,89 - 22,06
150 - 450
10,34 - 31,02
25 - 50
1,72 - 3,45
40 - 80
2,76 - 5,52
1/2 - 5
0,03 - 0,34
2 - 10
0,14 - 0,69
2 - 20
0,14 - 1,38
10 - 30
0,69 - 2,07
20 - 50
1,38 - 3,45
20 - 70
1,38 - 4,83
40 - 105
2,76 - 7,24
25 - 150
1,72 - 10,34
30 - 170
2,07 - 11,72
Size (DN)
1/4"
(DN8)
3/8"
(DN12)
1/2" & 3/4"
(DN15 & DN20)
1" & 1-1/4"
(DN25 & DN32)
1-1/2"
(DN40)
2"
(DN50)
2-1/2" (DN65)
3" (DN80)
4" (DN100)
Seat Material
SST
Jorcote
SST
Jorcote
SST
Jorcote
SST
Jorcote
SST
Jorcote
SST
Jorcote
Jorcote
Jorcote
Jorcote
-3-
0.42 (0,36)
0.21 (0,18)
0.08 (0,07)
0.008
(0,007)
0.004
(0,003)
0.002
(0,002)
0.04 (0,03)
0.02 (0,02)
0.0008 (0,0007)
(N/A in 316SS)
1/4" - 3/4"
1-1/4"
1-1/2"
2"
2-1/2" - 4"
Notes:
Nominal
Cv
1.
2.
3.
-4-
Cv @ 30%
Build-Up
0.85
0.84
0.91
1.33
1.37
1.33
1.32
1.42
2.08
2.13
2.35
2.32
2.49
3.66
3.75
2.41
2.53
2.66
2.65
4.57
6.40
3.58
3.75
3.95
3.93
6.79
9.50
4.96
5.20
5.47
5.45
9.35
15.00
8.26
8.66
9.12
9.09
15.59
25.00
9.97
10.44
10.95
10.90
18.71
30.00
55.00
55.00
55.00
115.00
115.00
113.36
200.00
200.00
170.10
Installed Cv
1.6
1/4" - 3/4"
2.5
4.4
Notes:
Set Pressure
Cv @ 5%
Build-Up
Cv @ 10%
Build-Up
Cv @ 15%
Build-Up
Cv @ 20%
Build-Up
Cv @ 30%
Build-Up
0.23
0.38
0.52
0.64
0.87
10
0.28
0.47
0.64
0.79
1.08
20
0.32
0.54
0.75
0.94
1.29
30
0.35
0.59
0.84
1.06
1.46
50
0.38
0.67
0.94
1.20
1.60
80
0.45
0.80
1.15
1.47
1.60
115
0.50
0.92
1.32
1.60
1.60
160
0.70
1.32
1.60
1.60
1.60
180
0.74
1.40
1.60
1.60
1.60
0.36
0.60
0.81
1.00
1.36
10
0.43
0.73
0.99
1.24
1.69
20
0.49
0.84
1.17
1.47
2.01
30
0.54
0.93
1.31
1.65
2.28
50
0.60
1.04
1.47
1.88
2.50
80
0.70
1.26
1.79
2.30
2.50
115
0.78
1.43
2.06
2.50
2.50
160
1.10
2.06
2.50
2.50
2.50
180
1.16
2.19
2.50
2.50
2.50
0.64
1.05
1.42
1.76
2.39
10
0.76
1.28
1.75
2.18
2.98
20
0.87
1.48
2.05
2.58
3.54
30
0.96
1.63
2.30
2.91
4.01
50
1.05
1.84
2.60
3.31
4.40
80
1.23
2.21
3.15
4.05
4.40
115
1.38
2.52
3.63
4.40
4.40
160
1.93
3.62
4.40
4.40
4.40
180
2.04
3.85
4.40
4.40
4.40
1.
2.
Assumes SST diaphragm, optimal spring range for set point, and minimum flow = 5% of Cv.
3.
-5-
DN8 - DN50
1/4" - 2"
Temp
F
DI Body
BRZ Body
Temp C
150#
300#
TE
150#
300#
TE
-20-100
250
300 (600)
300 (600)
225
300 (500)
300 (500)
200
235
300 (600)
300 (600)
215
300 (475)
300 (475)
300
215
300 (565)
300 (600)
195
300 (425)
400
200
300 (525)
300 (600)
170
300 (375)
500
170
300 (495)
300 (600)
150
600
140
300 (465)
300 (600)
650
125
300 (450)
300 (600)
DI Body
300#
TE
150#
300#
TE
-29 to 38
17
21 (41)
21 (41)
16
21 (34)
21 (34)
93
16
21 (41)
21 (41)
15
21 (33)
21 (33)
300 (425)
149
15
21 (39)
21 (41)
13
21 (29)
21 (29)
300 (375)
204
14
21 (36)
21 (41)
12
21 (26)
21 (26)
300 (325)
300 (325)
260
12
21 (34)
21 (41)
10
21 (22)
21 (22)
316
10
21 (32)
21 (41)
343
21 (31)
21 (41)
DN8 - DN50
1/4" - 2"
Temp
F
CS Body
Temp C
SS Body
CS Body
300#
TE
150#
300#
TE
-29 to 38
20
21 (51)
21 (66)
19
21 (49)
21 (66)
93
18
21 (47)
21 (66)
17
21 (43)
21 (66)
300 (950)
149
16
21 (45)
21 (66)
15
21 (39)
21 (66)
300 (950)
204
14
21 (44)
21 (66)
13
21 (36)
21 (66)
300 (480)
300 (950)
260
12
21 (41)
21 (66)
12
21 (33)
21 (66)
300 (450)
300 (950)
316
10
21 (38)
21 (66)
10
21 (31)
21 (62)
300 (445)
300 (950)
343
21 (37)
21 (66)
21 (31)
21 (61)
300#
TE
150#
300#
TE
-20-100
285
300 (740)
300 (950)
275
300 (720)
300 (950)
200
260
300 (675)
300 (950)
240
300 (620)
300 (950)
300
230
300 (655)
300 (950)
215
300 (560)
400
200
300 (635)
300 (950)
195
300 (515)
500
170
300 (600)
300 (950)
170
600
140
300 (550)
300 (950)
140
650
125
300 (535)
300 (950)
125
DN65 - DN100
2-1/2" - 4"
DI Body
150#
300#
SS Body
150#
150#
Temp F
BRZ Body
150#
CS Body
Temp C
SS Body
150#
300#
150#
300#
DI Body
CS Body
SS Body
150#
300#
150#
300#
150#
300#
-20 to 100
250
500
285
500
275
500
-29 to 38
17
34
20
34
19
34
200
235
500
260
500
240
500
93
16
34
18
34
17
34
300
215
500
230
500
215
500
149
15
34
16
34
15
34
400
200
500
200
500
195
500
204
34
14
34
13
34
500
170
495
170
500
170
500
260
12
34
12
34
12
34
600
140
300
140
300
140
300
316
10
21
10
21
10
21
650
125
300
125
300
125
300
343
21
21
21
CS Body
SS Body
38
102
99
93
93
85
1120
149
91
77
1030
204
88
71
1208
955
260
83
66
600
1095
905
316
75
62
650
1075
890
343
74
61
Temp F
CS Body
SS Body
100
1480
1440
200
1355
1240
300
1315
400
1270
500
Temp C
Notes:
1. Double bolting option is required to reach pressures indicated in parentheses ( ).
2. If weld flanges are supplied, use ratings in "TE" column or flange rating, whichever is less (i.e. ANSI 600/900 flanges or PN64/100 flanges).
-6-
Dimensions MK50/MK50QC
D
A
A1
Size
Mat'l
1/2" &
3/4"
DI/BRZ
1"
1-1/4"
1-1/2"
2"
Dimensions (inches)
A
B~QC
Weight
(lbs.)
3.62
8.50
10.25
1.69
5.12
10
CS/SS
3.62
8.50
10.25
1.69
5.12
12
DI/BRZ
4.12
10.00
11.37
2.62
7.09
21
CS/SS
4.18
10.75
12.00
2.63
7.09
25
DI/BRZ
4.12
10.00
11.37
2.62
7.09
21
DI/BRZ
4.50
10.25
11.37
2.31
7.09
23
CS/SS
4.81
11.00
12.25
2.25
7.09
31
DI/BRZ
4.50
10.25
11.37
2.75
7.09
26
CS/SS
5.50
11.00
12.25
2.75
7.09
35
Size
Mat'l
DN15
& 20
DI/BRZ
DN25
DN32
DN40
DN50
Dimensions
A
B~QC
Wgt.
(kg)
91,95
215,90
260,35
42,93
130,05
4,5
CS/SS
91,95
215,90
260,35
42,93
130,05
5,4
DI/BRZ
104,65
254,00
288,80
66,55
180,09
9,5
CS/SS
106,17
273,05
304,80
66,55
180,09
11,3
DI/BRZ
104,65
254,00
288,80
66,55
180,09
9,5
DI/BRZ
114,30
260,35
288,80
58,67
180,09
10,4
CS/SS
122,17
279,40
311,15
57,15
180,09
14,1
DI/BRZ
114,30
260,35
288,80
69,85
180,09
11,8
CS/SS
139,70
279,40
311,15
69,85
180,09
15,9
-7-
Dimensions MK50
D
C
A
A1
Size
1/2"
3/4"
1"
1"
1"
2"
ANSI
Flange
A1
CS/SS
All
All
DI/
BRZ
CS/
SS
8.50
8.50
1.69
5.12
13
15
8.50
8.50
1.69
5.12
14
16
DI/
BRZ
CS/
SS
DI/
BRZ
150#
7.25
7.25
300#
7.50
7.50
150#
7.25
7.25
8.50
8.50
1.69
5.12
14
16
300#
7.62
7.62
8.50
8.50
1.69
5.12
16
17
150#
7.251
7.252
10.0
10.75
2.62
7.09
26
34
300#
8.75
7.75
10.0
10.75
2.62
7.09
28
37
150#
7.87
10.0
2.62
7.09
28
300#
8.37
10.0
2.62
7.09
31
150#
8.751
8.752
10.25
11.22
2.31
7.09
42
46
300#
10.25
9.25
10.25
11.22
2.31
7.09
45
52
150#
10.0
10.0
10.25
11.42
2.75
7.09
46
50
300#
10.5
10.5
10.25
11.42
2.75
7.09
49
55
Size
1/2"
3/4"
1"
1-1/4"
1-1/2"
Size
(DN)
15
20
25
32
40
50
2"
IFE only
Flange
(PN)
A1
DI/
BRZ
10/16
25/40
Weight (kg)
CS/SS
All
All
DI/
BRZ
CS/
SS
215,9
215,9
42,9
130
5,9
5,9
215,9
215,9
42,9
130
6,4
6,4
CS/SS
DI/
BRZ
184,2
184,2
190,5
190,5
10/16
184,5
184,2
215,9
215,9
42,9
130
6,4
6,4
25/40
193,5
193,5
215,9
215,9
42,9
130
7,3
7,7
10/16
184,2
184,2
254,0
273,1
66,5
180
11,8
15,4
25/40
223,11
196,9
254,0
273,1
66,5
180
12,7
16,8
10/16
199,9
254,0
66,5
180
12,7
25/40
212,6
254,0
66,5
180
14,1
10/16
222,31
222,32
260,4
285,0
58,7
180
19,1
20,9
25/40
260,31
235,02
260,4
285,0
58,7
180
20,4
23,6
10/16
254,0
254,0
260,4
290,1
69,9
180
20,9
22,7
25/40
266,7
266,7
260,4
290,1
69,9
180
22,2
24,9
Weight
(lbs.)
20
25
32
40
50
IFE only
-8-
Dimensions (inches)
A
Weight
(lbs.)
150#
7.25
8.50
1.75
5.12
13
300#
7.50
8.50
1.87
5.12
14
150#
7.25
8.50
1.93
5.12
14
300#
7.62
8.50
2.31
5.12
16
150#
7.25
10.00
2.12
7.09
26
300#
8.75
10.00
2.43
7.09
28
150#
7.87
10.00
2.31
7.09
28
300#
8.37
10.00
2.62
7.09
31
150#
8.75
10.25
2.50
7.09
42
300#
10.25
10.25
3.06
7.09
45
150#
10.00
10.25
3.00
7.09
46
300#
10.50
10.25
3.25
7.09
49
Size
(DN)
15
Flange
Flange
(PN)
Dimensions
A
Weight
(kg)
10/16
184,2
215,9
44,5
130
5,9
25/40
190,5
215,9
47,5
130
6,4
10/16
184,4
215,9
49,0
130
6,4
25/40
193,5
215,9
58,7
130
7,3
10/16
184,2
254,0
53,8
180
11,8
25/40
222,3
254,0
61,7
180
12,7
10/16
199,9
254,0
58,7
180
12,7
25/40
212,6
254,0
66,5
180
14,1
10/16
222,3
260,4
63,5
180
19,1
25/40
260,3
260,4
77,7
180
20,4
10/16
254,0
260,4
76,2
180
20,9
25/40
266,7
260,4
82,6
180
22,2
Dimensions MK50
D
A
A1
Mark 50: Flanged Ends, ANSI
Dimensions (inches)
ANSI
Flange
Size
150#
1/2"
3/4"
1"
1"
1"
2"
A1
Weight
(lbs.)
DI/
BRZ
CS/
SS
DI/
BRZ
CS/
SS
All
All
DI/
BRZ
CS/
SS
7.25
7.25
8.50
8.50
1.69
5.12
13
15
300#
7.50
7.50
8.50
8.50
1.69
5.12
14
16
150#
7.25
7.25
8.50
8.50
1.69
5.12
14
16
300#
7.62
7.62
8.50
8.50
1.69
5.12
16
17
150#
7.25
7.25
10.0
10.75
2.62
7.09
26
34
300#
8.751
7.752
10.00
10.75
2.62
7.09
28
37
150#
7.87
10.00
2.62
7.09
31
300#
8.37
10.00
2.62
7.09
31
150#
8.75
10.25
11.22
2.31
7.09
42
46
300#
10.25
150#
300#
8.75
2
9.25
10.25
11.22
2.31
7.09
45
52
10.00
10.00
10.25
11.42
2.75
7.09
46
50
10.50
10.50
10.25
11.42
2.75
7.09
49
55
Size
DN
15
20
25
32
40
50
Flange
PN
10/16
A1
2-1/2"
3"
4"
125-150#
Weight (kg)
DI/
BRZ
CS/
SS
DI/
BRZ
CS/
SS
All
All
DI/
BRZ
CS/
SS
184
130
216
240
43
130
5,9
6,8
25/40
184
130
216
240
43
130
6,4
7,3
10/16
184
150
216
240
43
130
6,4
7,3
25/40
184
150
216
240
43
130
7,3
7,7
10/16
184
160
273
262
67
180
11,8
15,4
25/40
184
160
273
262
67
180
12,7
16,8
10/16
200
273
67
180
12,7
25/40
200
273
67
180
4,1
10/16
222
200
279
285
59
180
19,1
20,9
25/40
222
200
279
285
59
180
20,4
23,6
10/16
254
230
279
290
70
180
20,9
22,7
25/40
254
230
279
290
70
180
22,2
24,9
Weight
(lbs.)
10.88
18.75
6.95
12.75
165
Larger Sizes
250-300#
11.50
18.75
6.95
12.75
165
125-150#
11.75
18.75
6.95
12.75
185
250-300#
12.50
18.75
6.95
12.75
185
125-150#
13.88
19.95
8.00
12.75
215
250-300#
14.50
19.95
8.00
12.75
215
Weight
(kg)
10/16
283
476
177
324
75
25/40
283
476
177
324
75
10/16
312
476
177
324
84
25/40
312
476
177
324
84
10/16
350
507
203
324
98
25/40
350
507
203
324
98
Larger Sizes
65
80
100
1.
1.
2.
IFE only.
2.
-9-
Dimensions MK50HP
Mark 50HP: Flanged Ends
Dimensions (inches)
Size
1/2"
3/4"
1"
1-1/4"
1-1/2"
C
A
A1
DI/BRZ
3.62
12.75
1.75
5.12
15
CS/SS
3.62
12.75
1.75
5.12
17
DI/BRZ
4.12
13.00
2.12
5.20
21
CS/SS
4.18
13.25
2.12
5.20
25
DI/BRZ
4.12
13.00
2.12
5.20
21
DI/BRZ
4.50
13.25
2.31
5.20
23
CS/SS
4.81
13.75
2.50
5.20
31
DI/BRZ
4.50
13.25
2.50
5.20
26
CS/SS
5.50
14.00
2.50
5.20
35
Mat'l
1/2" &
3/4"
1"
1-1/4"
1-1/2"
2"
15 & 20
25
32
40
50
Mat'l
Dimensions
A
Weight
(lbs.)
All
DI/BRZ
CS/SS
All
All
All
150#
7.25
7.25
12.75
1.69
5.20
300#
7.50
7.50
12.75
1.69
5.20
600#
8.00
8.00
12.25
1.69
5.20
150#
7.25
7.25
12.75
1.69
5.20
300#
7.62
7.62
12.75
1.69
5.20
600#
8.12
8.12
12.25
1.69
5.20
150#
7.25
7.25
13.25
2.62
5.20
300#
7.75
7.75
13.25
2.62
5.20
600#
8.25
8.25
12.75
2.62
5.20
150#
7.87
12.75
2.62
5.20
300#
8.37
12.75
2.62
5.20
150#
8.75
8.75
13.75
2.31
5.20
300#
9.25
9.25
13.75
2.31
5.20
600#
9.87
9.87
13.25
2.31
5.20
150#
10.00
10.00
14.00
2.75
5.20
300#
10.50
10.50
14.00
2.75
5.20
600#
11.25
11.25
13.50
2.75
5.20
21
22
37
37
45
49
15
20
25
32
Weight
(kg)
DI/BRZ
92,0
324
44,5
130,0
6,8
CS/SS
92,0
324
44,5
130,0
7,7
DI/BRZ
104,7
330
53,9
132,1
9,5
CS/SS
106,2
337
53,9
132,1
11,3
DI/BRZ
104,7
330
53,9
132,1
9,5
DI/BRZ
114,3
337
58,7
132,1
10,4
CS/SS
122,2
349
63,5
132,1
14,1
DI/BRZ
114,3
337
63,5
132,1
11,8
CS/SS
139,7
356
63,5
132,1
15,9
Size
(DN)
Size
(DN)
Dimensions (inches)
Weight
(lbs.)
Size
A1
2"
Flange
40
50
-10-
Flange
PN
Dimensions (mm)
A1
B2
Weight
(kg)
All
All
All
DI/BRZ1
CS/SS
All
10/16
184,2
130,0
324
42,9
132,1
25/40
184,2
130,0
324
42,9
132,1
10/16
184,2
150,0
324
42,9
132,1
25/40
184,2
150,0
324
42,9
132,1
10/16
184,2
160,0
337
66,6
132,1
25/40
184,2
160,0
337
66,6
132,1
10/16
199,9
324
66,6
132,1
25/40
199,9
324
66,6
132,1
10/16
222,3
200,0
349
58,7
132,1
25/40
222,3
200,0
349
58,7
132,1
10/16
254,0
230,0
356
69,9
132,1
25/40
254,0
230,0
356
69,9
132,1
1.
2.
3.
9,5
10,0
16,8
16,8
20,4
22,2
Dimensions MK51
D
A
A1
Dimensions (inches)
A
Weight
(lbs.)
DI/BRZ
3.62
10.25
2.25
7.12
12
CS/SS
3.62
10.25
2.25
7.12
13
Size
Material
1/2" &
3/4"
Size
1/2" &
3/4"
ANSI
Flange
A1
DI/
BRZ
B
CS/
SS
DI/
BRZ
CS/
SS
All
All
Weight
(lbs.)
DI/
BRZ
CS/
SS
150#
9.62
9.62
10.25
10.25
2.25
7.12
26
26
300#
10.25
10.25
10.25
10.25
2.25
7.12
29
29
CS/
SS
All
All
DI/
BRZ
CS/
SS
Size
(DN)
15 &
20
Material
DI/BRZ
CS/SS
Dimensions (mm)
A
Weight
(kg)
92,0
260,4
57,2
180,9
5,4
92,0
260,4
57,2
180,9
5,9
Dimensions (mm)
Size
(DN)
Flange
PN
15 &
20
Note: 1/4" & 3/8" utilize 1/2" body with reducer bushings.
-11-
A1
Weight (kg)
DI/
BRZ
CS/
SS
DI/
BRZ
10/16
244,4
244,4
260,4
260,4
57,2
180,9
11,8
11,8
25/40
260,4
260,4
260,4
260,4
57,2
180,9
13,2
13,2
Specifications
Sizes: 1-1/2" & 2" (DN40 & DN50)
End Connections:
Threaded (FNPT, BSPT, BSPP)
ANSI Flanges (150#, 300#)
DIN Flanges (PN10/16, PN25/40)
Body Materials: Ductile Iron, Bronze, Carbon Steel (A216
WCB), Stainless Steel (A351/CF8M)
Trim Materials:
303SST Standard on Ductile Iron, Bronze, Carbon
Steel valves
316SST Standard on Stainless Steel Valves
Monel, Hastelloy and other Alloys available
Seat Materials:
Jorcote on SST Standard
Diaphragm Materials:
Stainless Steel standard
Buna-N optional
Jorlon optional
Viton optional
Service: Steam, water, oil, gas, air and chemicals
-12-
Ordering Schematic
1
Model
50
10
Seat Material
Standard
303SS/Jorcote
316SS/Jorcote
50HP
High Pressure
50QC
Quick Change
51
Large Diaphragm
Cv (Kv)
1
Size
Inches (DN)
Inches (DN)
0.21 (0,28)
15 (12,93)
0.42 (0,36)
25 (21,55)
0.84 (0,72)
30 (25,86)
025
1/4" (DN8)
150
1-1/2" (DN40)
1.6 (1,38)
D*
55 (47,41)
038
3/8" (DN10)
200
2" (DN50)
2.5 (2,16)
F*
85 (73,28)
050
1/2" (DN15)
250
4.4 (3,79)
G*
115 (99,14)
075
3/4" (DN20)
300
6.4 (5,52)
I*
200 (172,41)
100
1" (DN25)
400
9.5 (8,19)
Body Material
1/4" - 3/4"
1" - 2"
2-1/2" - 4"
DI
Ductile Iron
14
BR
34
CS
Carbon Steel
53
20-45 (1,38-3,10)
21
4-13 (0,28-0,90)
S6
Stainless Steel
76
30-135 (2,07-9,31)
31
8-20 (0,55-1,38)
CI
A4
80-185 (5,52-12,76)
50
15-80 (1,3-5,52)
95
45-150 (3,10-10,34)
End Connections
2-20 (0,14-1,38)
03
1/2-4 (0,03-0,28)
10-30 (0,69-2,07)
06
2-6 (0,14-0,41)
22
4-15
(0,28-1,3)
30
7-24
(0,48-1,65)
52
16-30
(1,10-2,07)
2-1/2" - 4"
PT
NPT
BT
BSPT
BP
BSPP
SW
FSW
I5
150# IFE
F5
04
1/2-5 (0,03-0,34)*
62
I3
300# IFE
08
2-10 (0,14-0,69)
86
40-105 (2,76-7,24)
F3
14
2-20 (0,14-1,38)
69
25-150 (1,72-10,34)
34
10-30 (0,69-2,07)
79
30-170 (2,07-11,72)
I1
125# IFE
54
20-50 (1,38-3,45)
I5
150# IFE
I2
250# IFE
I3
300# IFE
S6
I7
VI
Viton
I6
BN
I8
JL
Jorlon
I4
A1
75-190 (5,17-13,10)
64
25-50 (1,72-3,45)
A7
100-320 (6,89-22,06)
82
40-80 (2,76-5,52)
A9
150-450 (10,34-31,02)
10
Trim
S3
303SS
I3
S6
316SS
I6
Diaphragm
-13-
Actuator
MD
ED
Size (DN)
1-1/2" - 2"
(DN40 - DN50)
Spring Ranges
PSI
BAR
0.5 - 4
0,03 - 0,28
2-6
0,14 - 0,41
4 - 13
0,28 - 0,90
8 - 20
0,55 - 1,38
15 - 80
1,03 - 5,52
45 - 150
3,10 - 10,34
Size (DN)
Seat
Material
Maximum PSI
(bar)
25 (21,5)
Jorcote
150 (10,34)
30 (25,8)
Jorcote
150 (10,34)
35 (30,1)
Jorcote
150 (10,34)
45 (38,7)
1-1/2" (DN40)
Jorcote
150 (10,34)
50 (43,0)
2" (DN50)
Jorcote
150 (10,34)
Cv (Kv)
Size (DN)
Seat
Material
Maximum PSI
(bar)
65 (55,9)
1-1/2" (DN40)
Jorcote
150 (10,34)
70 (60,2)
2" (DN50)
Jorcote
150 (10,34)
Mark 502
-14-
Dimensions MK501/502
D
A
A1
Weight
(lbs.)
DI/BRZ
4.50
10.25
2.75
7.09
26
CS/SS
5.50
11.00
2.75
7.09
35
Size
Material
1-1/2"
- 2"
Dimensions (inches)
ANSI
Flange
Size
1-1/2"*
Size
(DN)
40 - 50
Dimensions (mm)
2"
Weight
(kg)
DI/BRZ
114
260
70
180
11,8
CS/SS
140
279
70
180
15,9
Material
A1
Weight
(lbs.)
DI/
BRZ
CS/SS
DI/
BRZ
CS/
SS
All
All
DI/
BRZ
CS/
SS
150#
10.00*
10.00*
10.25
11.22
2.31
7.09
42
46
300#
10.25*
10.25*
10.25
11.22
2.31
7.09
45
52
150#
10.00
10.00
10.25
11.42
2.75
7.09
46
50
300#
10.50
10.50
10.25
11.42
2.75
7.09
49
55
Dimensions (mm)
Size
(DN)
Flange
PN
40
50
-15-
A1
All
All
Weight (kg)
DI/
BRZ
CS/
SS
DI/
BRZ
CS/
SS
DI/
BRZ
CS/
SS
10/16
254
254
279
285
58,7
25/40
260
260
279
285
58,7
180
19,1
20,9
180
20,4
23,6
10/16
254
230
279
290
69,9
180
20,9
22,7
25/40
267
230
279
290
69,9
180
22,2
24,9
MK50/0214/AB
Ordering Schematic
1
Model
501
High Flow
502
Size
10
303SS/Jorcote
316SS/Jorcote
25 (22)
1-1/2" (DN40)
30 (26)
2" (DN50)
35 (30)
45 (39)
50 (43)
Ductile Iron
65 (56)
BR
Bronze
70 (60)
CS
Carbon Steel
S6
Stainless Steel
150
200
Body Material
DI
Range
03
06
2 - 6 (0,14 - 0,41)
NPT
21
4 - 13 (0,28 - 0,90)
BSPT
31
8 - 20 (0,55 - 1,38)
I5
50
15 - 80 (1,03 - 5,52)
F5
150# FE DI or BR
95
I7
F7
PN10 FE DI or BR
End Connections
PT
BT
Diaphragm
S6
316 SST
I6
F6
PN16 FE DI or BR
VI
Viton
Buna-N
BP
BSPP
BN
SW
FSW
JL
Jorlon
I3
F3
300# FE DI or BR
10
Actuator
MD
F8
PN25 FE DI or BR
ED
I4
F4
PN40 FE DI or BR
I8
11
Trim
12
Cv (Kv)
A
Inches (DN)
11
Seat Material
V
Double Bolting
00
None
ZZ
Non-Standard
12
Accessories
S3
303SS
None
S6
316SS
316 SS Bolting
I3
303SSF/IFE
Hi-Temperature Bolting
I6
316SSF/IFE
Non-Standard