Mark 5108 Series Back Pressure Regulating Valves Back Pressure Regulating

Mark 5108 Series Back Pressure Regulating Valves Back Pressure Regulating
Back Pressure Regulating Valves
Mark 5108 Series
Back Pressure Regulating Valves
In many liquid piping systems, it is vital that line
pressure is maintained within relatively narrow limits. The Mark 5108 is designed to do just that. The
Mark 5108 can act as a back pressure/sustraining
valve, bypass pressure control valve, or a surge/
relief valve.
Operation
Back Pressure/Sustaining
Open under normal conditions and closes as upstream pressure falls below set point. Valve allows
flow when inlet pressure is above the set-point thus
preventing inlet pressure from falling too low. Prevents demand from “robbing” the source, or keeps
pump “on its curve.”
Bypass Pressure Control
Opens and modulates to maintain the required
pressure. Valve keeps pumping system at a
constant pressure by providing back to source.
Provides accurate pressure control when system
demand varies widely.
Closed under normal operating pressures. Valve will
close when system pressure drops below set point.
Protects system from overpressure by exhausting
excess pressure. The valve may only have to
operate intermittently to prevent pressure surges
that might occur on pump start, pump stopm or
sudden downstream valve closure.
•
Operates automatically off line pressure.
•
Inlet pressure is accurate over wide range of flow.
•
Inlet Pressure is adjustable with a complete range
of control springs.
•
Heavy-duty, nylon-reinforced diaphragm.
•
Rectangular-shaped, soft seat seal provides drip
tight Class VI closure.
•
Diaphragm assembly Guided top and bottom.
•
Throttling seat retainer for flow and pressure stability.
•
Easily maintained without removal from the line.
•
Replaceable seat ring.
•
Alignment pins assure proper reassembly after
maintenance.
•
Valves are factory tested.
•
Valves are serial numbered and registered to facilitate replacement parts and factory support.
Jordan Valve, a division of Richards Industries
3170 Wasson Road • Cincinnati, OH 45209
513.533.5600 • 800.543.7311 • 513.871.0105 (f)
[email protected] • www.jordanvalve.com
Mark 5108 Series
Surge Relief
Valve Features
Mark 5108 Series Back Pressure Regulating Valves
Specifications
Sizes:
Materials:
Globe Flanged: 1.25"- 24" (32 mm - 600 mm)
Angle Flanged: 1.25" - 16" (32 mm - 400 mm)
Glove/ Angle Threaded: 1.25" - 3" (32 mm - 80 mm)
Globe Angle Grooved: 1.5" - 4" (32 mm - 100 mm)
Body/Bonnet: Ductile Iron (epoxy coated), Carbon steel
(epoxy coated), Stainless Steel, B61 bronze,
Ni-Al-Bronze, Duplex Stainless Steel, Monel
Seat Ring: Bronze B61, Stainless Steel,
Optional: Ni-Al-Bronze, Duplex Stainless Steel, Monel
End Connections:
• Flanged
• Threaded
• Grooved
Stem: Stainless Steel, Monel, Optional: Duplex Stainless
Steel
Spring: Stainless Steel, Optional: Inconel
Temperature Range:
Diaphragm: Buna-N Nylon Reinforced, Viton, EPDM
(Valve Elastomers)
Buna-N: -20°F to 180°F (-29°C to 82°C)
Viton: 20°F to 230°F (7°C to 110°C)
Fluorisilicon: -40°F to 150°F (-40°C to 66°C)
EPDM: 0°F to 230°F (-18°C to 110°C)
Seat Disc: Buna-N, Viton, EPDM
Pilot: Bronze, Stainless Steel (Other pilot system
components: Bronze/Brass, All Stainless Steel) Optional:
Ni-Al-Bronze, Duplex Stainless Steel, Monel
Spring Ranges: (inlet setting)
Tubing & Fittings: Copper/brass, Stainless Steel,
Optional: Monel
5-30 psi (0,34 - 2,07 bar)
20-80 psi (1,38 - 5,52 bar)
65-180 psi (4,48 - 12,41 bar)
100-300 psi (6,89 - 20,68 bar)
Flow Chart for full port valve
Valve Size
Inches
(mm)
1.25
(32)
1.5
(40)
2
(50)
Cv (Kv)
2.5
(65)
3
(75)
4
(100)
6
(150)
8
(200)
10
(250)
12
(300)
14
(350)
16
(400)
24
(600)
200
(172)
450
(387)
760
(653,6)
1,250
(1075)
1,940
(1668,4)
2,200
(1892)
2,850
(2451)
6,900
(5934)
550
(473)
1,000
(1376)
1,600
(1376)
2,400
(2064)
–
4,000
(3400)
–
Globe Cv
(Kv)
23
27
47
68
120
(19,8) (23,2) (40,4) (53,5) (103,2)
Angle Cv
(Kv)
30
35
65
87
160
270
(25,8) (30,1) (55,9) (74,8) (137,6) (232,2)
Flow
(GPM)
@ 25 ft/sec
115
160
260
375
575
1,000
2,250
3,900
6,125
8,750
10,600
13,750
31,250
Flow
(GPM)
@ 45 ft/sec
210
280
460
650
1,000
1,800
4,000
7,000
11,000
16,000
19,000
25,000
56,000
-2-
Mark 5108 Series Back Pressure Regulating Valves
Dimensions
U.S. Dimensions- Inches
Dim.
End Conn.
1 1/4 – 1 1/2
2
2 1/2
3
4
6
8
10
12
14
16
24
A
Threaded
8 3/4
9 7/8
10 1/2
13
–
–
–
–
–
–
–
–
Grooved
8 3/4
9 7/8
10 1/2
13
15 1/4
20
–
–
–
–
–
–
150# Flg
8 1/2
9 3/8
10 1/2
12
15
17 3/4
25 3/8
29 3/4
34
39
40 3/8
62
B
300# Flg
8 3/4
9 7/8
11 1/8
12 3/4
15 5/8
18 5/8
26 3/8
31 1/8
36 1/2
40 1/2
42
63 3/4
Threaded
1 7/16
1 11/16
1 7/8
2 1/4
–
–
–
–
–
–
–
–
Grooved
1*
1 3/16
1 7/16
1 3/4
2 1/4
3 5/16
–
–
–
–
–
–
150# Flg
2 5/16- 2 1/2
3
3 1/2
3 3/4
4 1/2
5 1/2
6 3/4
8
9 1/2
10 5/8
11 3/4
16
300# Flg
2 5/8- 3 1/16
3 1/4
3 3/4
4 1/8
5
6 1/4
7 1/2
8 3/4
10 1/4
11 1/2
12 3/4
18
Threaded
4 3/8
4 3/4
6
6 1/2
–
–
–
–
–
–
–
–
Grooved
4 3/8*
4 3/4
6
6 1/2
7 5/8
–
–
–
–
–
–
–
150# Flg
4 1/4
4 3/4
6
6
7 1/2
10
12 11/16
14 7/8
17
–
20 13/16
–
300# Flg
4 3/8
5
6 3/8
6 3/8
7 13/16
10 1/2
13 3/16
15 9/16
17 3/4
–
21 5/8
–
Threaded
3 1/8
3 7/8
4
4 1/2
–
–
–
–
–
–
–
–
Grooved
3 1/8*
3 7/8
4
4 1/2
5 5/8
–
–
–
–
–
–
–
150# Flg
3
3 7/8
4
4
5 1/2
6
8
11 3/8
11
–
15 11/16
–
300# Flg
3 1/6
4 1/8
4 3/8
4 3/8
5 13/16
6 1/2
8 1/2
12 1/16
11 3/4
–
16 1/2
–
E
ALL
6
7
7
6 1/2
8
10
11 7/8
15 3/8
17
18
19
27
C
Angle
D
Angle
F
ALL
3 7/8
3 7/8
3 7/8
3 7/8
3 7/8
3 7/8
6 3/8
6 3/8
6 3/8
6 3/8
6 3/8
8
G
ALL
6
7 11/16
8 3/4
8 3/4
11 3/4
14
21
24 1/2
28
31 1/4
34 1/2
52
H
ALL
10
11
11
11
12
13
14
17
18
20
20
28 1/2
*Grooved end not available in 1 1/4"
Metric Dimensions- M.M
Dim.
A
B
End Conn.
DN32DN40
DN50
DN65
DN80
Threaded
222
251
267
330
Grooved
222
251
267
330
150# Flg
216
238
267
305
300# Flg
222
251
283
324
Threaded
37
43
48
57
Grooved
25*
30
37
44
150# Flg
59 - 64
76
89
95
DN100
DN150
DN200
DN250
DN300
DN350
DN400
DN600
–
–
–
–
–
–
–
–
387
508
–
–
–
–
–
–
381
451
645
756
864
991
1026
1575
397
473
670
791
902
1029
1067
1619
–
–
–
–
–
–
–
–
57
84
–
–
–
–
–
–
114
140
171
203
241
270
298
406
300# Flg
67 - 78
83
95
105
127
159
191
222
260
292
324
457
Threaded
111
121
152
165
–
–
–
–
–
–
–
–
Grooved
111*
121
152
165
194
–
–
–
–
–
–
–
150# Flg
108
121
152
152
191
254
322
378
432
–
529
–
300# Flg
67 -78
83
95
105
127
159
191
222
260
292
324
457
Threaded
79
98
102
114
–
–
–
–
–
–
–
–
Grooved
79*
98
102
114
143
–
–
–
–
–
–
–
150# Flg
76
98
102
102
140
152
203
289
279
–
398
–
300# Flg
79
105
111
111
148
165
216
306
298
–
419
–
E
ALL
152
152
178
165
203
254
302
391
432
457
483
686
F
ALL
98
98
98
98
98
98
162
162
162
162
162
203
G
ALL
152
171
195
222
298
356
533
622
711
794
876
1321
H
ALL
254
279
279
279
305
330
356
432
457
508
508
724
C
Angle
D
Angle
*Grooved end not available DN32
-3-
Mark 5108 Series Back Pressure Regulating Valves
Schematics
The Mark 5108 consists of the following components,
arranged as shown on the schematic diagram:
1. Main Valve: A hydraulically-operated, diaphragm-
actuated, globe or angle valve which closes with an elastomer-on-metal-seal.
4.
2. Pressure Relief Pilot: A two-way, normally-closed pilot valve which senses upstream pressure under its diaphragm and balances it against an adjustable spring load. An increase in upstream
pressure tends to make the pilot open.
Flow Control Valve: A needle-type valve which
provides adjustable, restricted flow in one direction and free flow in the opposite direction. On the Mark 5108, the flow control valve is connected as a
closing speed control.
5. Y-Strainer (standard on water service valves): The strainer protects the pilot system from solid contaminants in the line fluid.
3. Ejector: A simple “tee” fitting with a fixed orifice in its inlet port. It provides the proper pressure to the diaphragm chamber of the main valve de-
pending on the position of the pressure reducing pilot.
6A/B. Two Ball Valves (standard on water service
valves, optional on fuel service valves): Useful for isolating the pilot system for maintenance or trouble shooting.
-4-
Mark 5108 Series Back Pressure Regulating Valves
Pilot
• Accurate sensing of outlet pressure
• Simple, single adjustment
All parts replaceable while mounted on valve
• Rubber-to-metal seat for positive shut-off
• Large area diaphragm for quick, precise throttling
• Visual indication of diaphragm condition
• Bronze and stainless steel construction
1330
2400
Pilot Materials
Bronze B-61
Stainless Steel ASTM A743/CF8M
Spring Ranges
5-30, 20-80, 65-180, 100-300 psi
Model 1330/ 2400
Pressure Reducing Pilot
1.
2.
3.
4.
5.
6.
7.
Adjusting Screw Cover
Adjusting Screw
Spring
Diaphragm
Pressure Sense
Pilot Outlet
Pilot Inlet
Pilot Materials
Stainless Steel ASTM A743/CF8M
Spring Ranges
200-750 psi
The Model 1330/2400 Pressure Sustaining Pilots control
the amount of pressure in the upper chamber of the
Main valve(s). (Hence, the degree of opening or closing
of the Main valve). The upstream pressure increases, the
pilot begins to open, decreasing the amount of pressure in the upper chamber of the main valve allowing
it to open a proportionate amount, in order to maintain
a constant inlet pressure. As the upstream pressure
decreases, the pilot begins to close, allowing the pressure in the upper chamber of the main valve to increase
causing it to close. This is a constant modulating action
compensating for any change in upstream pressure.
-5-
Mark 5108 Series Back Pressure Regulating Valves
MK5108/0116
Sizing Considerations
Surge Relief:
Bypass Pressure Control:
Size is determined by the amount of flow required to
lower the inlet pressure. This relief flow can be difficult
to determine, so a general guideline is to use 60% of
the rated pump flow. The 108 Series valve is capable
of intermittent flows up to 45 ft. per second. Relief valve
sizes are typically 50-60% of the mainline size.
Bypass pressure control valves are sized based on
maximum flow and pressure drop across the valve. The
maximum flow through the valve is the pump flow at the
desired set point (from the pump curve) minus the minimum system flow. The pressure drop across the valve is
the set point minus the pressure at the valve discharge
(typically pump suction or storage tank head). Determine the valve’s operating Cv using the maximum flow
and pressure drop from the formula:
Pressure Sustaining:
Sustaining valves are typically main line size. However,
maximum velocity through the valve should not exceed
25 ft/sec.
Where:
•
•
•
Qmax = maximum flow rate, gallons per minute
DP = pressure drop, psi
sg = liquid specific gravity
(water = 1.00)
From the Cv chart on Page 2, pick the smallest valve
that has at least the Cv determined above, and where
the velocity does not exceed 25 ft/sec.
How to Order Your Valve
When ordering, please provide:
•
•
•
Series Number
Valve Size
Globe/Angle
•
•
•
•
Pressure Class
Threaded/ Flanged/ Grooved
Trim Material
Adjustment Range
•
•
Pilot Options
Special Needs/ Installation
Requirements
Jordan Valve, a division of Richards Industries
3170 Wasson Road • Cincinnati, OH 45209
513.533.5600 • 800.543.7311 • 513.871.0105 (f)
[email protected] • www.jordanvalve.com
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