Pilot Valve Brochure
Pilot Valve Brochure
Pilot Valve Brochure
Dome
Pressure
P1 SYSTEM PRESSURE < SET PRESSURE
Vent
Atmospheric
Dome Pressure System is at an operating pressure condition
A Relief
Seat The seat (B) feeding the dome is open.
Main
Atmospheric
Valve Blow down The seat (A) feeding the vent is closed,
Pressure B Seat
Piston
Inlet
the dome is pressurized and the main
Pressure
P1 valve piston is on seat. The valve is in the
operational mode closed position.
Inlet 90% 100%
Pressure
P1
Set
Pressure
0% 110%
90% 100%
Opening Set
Pressure
Condition 0% 110%
SYSTEM PRESSURE = SET PRESSURE
Dome Stem Valve Syste m p re ssure reac he s se t p oi nt.
Pressure 1 Vent
<P1
Vent
The valve stem (1) opens the vent seat (A)
Dome Atmospheric
Pressure and releases pressure off the dome to
Relief
A Seat at mo sp he re . The valve stem (2 ) is
Main
Atmospheric Valve Blow down
pushed on seat (B) by the system pressure,
Pressure
Piston B Seat
Inlet Stem Valve
isolating system pressure from the dome
Pressure 2 Dome and the main valve piston begins to open.
P1
Inlet
Pressure 90% 100%
P1
Set
Pressure
0% 110%
90% 100%
Open Set
Pressure
Condition 0% 110%
Main A Relief
Seat
open and the dome is at atmospheric
Valve
Piston
pressure. The valve stem (2) remains
Atmospheric Blow down
Pressure B Seat closed on seat (B) and the main valve
Inlet
Pressure 2 Stem Valve
Dome piston is open. System pressure is relieving
P1
through main body.
Inlet 90% 100%
Pressure
P1
Set
Pressure
0% 110%
90% 100%
Closing Set
SYSTEM PRESSURE 95% 0F SET PRESSURE
Pressure
Condition 0% 110% The system pressure is reduced to 95% of
the set pressure, Blowdown is set at 5% by
Dome Stem Valve
Pressure
P1
1 Vent adjusting valve (C). Stem (1) closes seat (A)
Dome
Vent
Atmospheric
Pressure
se a ling the dom e from a tm osphe ric
Relief pressure. The valve stem (2) moves to the
A Seat
Main open position and system pressure begins
Valve
Atmospheric
Pressure Piston B Blow down
Seat
to pressurize the dome, forcing the main
Inlet
2 Stem Valve valve piston to go back on seat and
Pressure Dome
P1
Blow down closing the relief valve.
95%
C Adjustment
Taylor Valve Technology's Series 9300 Snap Acting Safety • Orifice Nozzles. The orifice size may be
Valve with the non-flowing pilot provides highly reliable changed by replacing a single component.
system overpressure protection. There are multiple orifice sizes for each
nominal body size.
This valve can be used for air, gas, vapor, and most
mixed phase services. The 9300 is available with • Built-in Field Test Port. Provides the
effective orifice areas of 0.128 through 45.664 inch, ability to accurately verify the set pressure
valve inlet sizes 1-inch through 8-inch, set pressures with the valve in place and in service.
from 15 to 3750 psig (1 to 260 barg). Continuous
service temperatures from -423°F to +500°F (-253°C • Durable, Rugged Mounting of Pilot.
to +260°C). Extra rigid mounting against the body protects
the pilot from system vibration.
(For Modulating Relief Valve see brochure on 9300-M)
Page 1
Series 9300 Pilot Operated Safety Valve Features
Coalescing Filter
Externally Adjustable Internal Back
Set Pressure Flow Preventer
Stainless Steel
Fittings
Screened Dome
Vent
Rigid Mounting
Filtered Field
Test Port
Stainless
Steel
Body
Externally
Adjustable Main Valve Seat
Blow Down
Field Replaceable
Replaceable Orifice Nozzle
Pitot Tube
Seat Holder
O-Ring
Seat Insert
Piston Guide
O-Ring
O-Ring Nozzle
Valve Piston O-Ring
Valve Disk
Page 3
Series 9300 Pilot Operated Safety Valve Orifice
API Sizes
API Letter D E F G H J J K
Inlet Size 1”,11⁄2” 1”,11⁄2” 1”,11⁄2” 11⁄2”,2” 11⁄2”,2” 2” 3” 3”
Outlet Size 2” 2” 2” 3” 3” 3” 4” 4”
Flow Area 0.128 0.212 0.357 0.472 0.913 1.431 1.431 2.138
Bore Diameter 0.404 0.52 0.674 0.775 1.078 1.35 1.35 1.65
Minimum Lift 0.202 0.26 0.337 0.388 0.539 0.675 0.675 0.825
Pressure Range 3750 3750 3570 3750 3750 2000 2000 2000
Rated Coefficent of
Discharge (Kd) 0.878 0.878 0.878 0.878 0.878 0.878 0.878 0.878
API Sizes
API Letter L L M N P Q R T
Inlet Size 3” 4” 4” 4” 4” 6” 6” 8”
Outlet Size 4” 6” 6” 6” 6” 8” 8” 10”
Flow Area 3.205 3.205 4.083 4.909 7.069 12.566 17.721 25.967
Bore Diameter 2.02 2.02 2.28 2.5 3 4 4.75 5.75
Minimum Lift 1.01 1.01 1.14 1.25 1.5 2 2.375 2.875
Pressure Range 2000 2000 2000 2000 1480 1480 1480 1480
Rated Coefficent of
Discharge (Kd) 0.878 0.878 0.878 0.878 0.878 0.878 0.878 0.878
Full Bore
Full Bore Size 1 1⁄2” 2” 3” 4” 6” 8”
Outlet Size 2” - 3” 3” 4” 6” 8” 10”
Flow Area 1.767 2.953 6.605 11.491 26.067 45.664
Bore Diameter 1.5 1.939 2.9 3.825 5.761 7.625
Minimum Lift 0.75 0.97 1.45 1.915 2.88 3.812
Pressure Range 2000 2000 1480 1480 1480 1480
Rated Coefficent of
Discharge (Kd) 0.774 0.774 0.774 0.774 0.774 0.774
Page 4
C
Page 5
C
Page 6
C
Orifices and Dimensions
A
264 120
264 120
Page 7
C
Orifices and Dimensions
A
264 120
Page 8
How to Size a Valve
Sizing Formulas
Valves are selected on the basis of their ability to meet an
expected relieving condition, flowing a sufficient amount of fluid Gas Flow
to prevent excessive pressure increase. This means that the size English Units Metric Units
of the valve orifice must be calculated taking the required flow,
performance characteristics, lading fluid properties, and other
factors into consideration. W TZ 13160 W TZ
A= A=
CKdP1Kb M CKdP1Kb M
The sizing procedure presented utilizes the recommended
practice of API 520 Part 1. The valve orifice areas and nozzle
discharge coefficients shown are effective values in that they are or
not specific to a particular valve type. The use of these
effective orifice areas and effective nozzle discharge V MTZ 35250 V TZM
coefficients will always allow for the selection of a valve A= A=
orifice area that will meet or exceed the required capacity. 6.32 CKdP1Kb C KdP1Kb
To select the minimum required orifice area that will flow the
required capacity of the system you wish to protect, please refer
to the following information which appears in this section:
1. Sizing Formulas
2. Correction Factors
3. Valve Flow Coefficients
Formula Symbols
Page 9
Sizing
Values of M, k and C for Representative Gases & Vapors Gas Constant,
Gas Constant,CC Gas Constant,
Gas Constant,CC
Gas or Vapor M k C
Molecular Specific Gas k C k C
Weight Heat Ratio Constant
1
Acetylene (C2H2) 26 1.26 343 1.00 315 1.52 366
Note
Air 29 1.40 356 1.02 318 1.54 368
0.98
Ammonia (NH3) 17 1.31 348 1.04 320 1.56k=1.0 369
The sizing software will apply the
Argon (Ar) 40
actual back pressure correction 1.67 378 1.06 322 1.58 371
factor(C
Benzene for6Hthe
6) valve selected.
78 1.12 329 1.08 324 1.60 372
0.96
Butadiene (C4H6) 54 1.12 329 1.62k=1.2 374
Backpressure Factor, Kb
These curves represent a 1.10 327
Carbon Dioxide (CO
conservative back2) pressure
44 1.28 345 1.12 329 1.64 376
correction
Carbon Monoxide factor
(CO)which can
28 be 1.40
applied to all orifice and valve 0.94 356 1.14 331 1.66 377
Ethane (C2H6)
sizes 30 1.19 336 1.16 333 1.68k=1.4 379
Ethylene (C2H4) 28 1.24 341 1.18 335 1.70 380
Freon 22 86.5 1.18 0.92 335 1.20 337 1.72 382
Helium (He) 4 1.66 377 1.22 339 1.74k=1.6 383
Hexane (C6H14) 86 1.06 322 1.24 341 1.76 384
Hydrogen (H2) 2 1.41 0.9 357 1.26 343 1.78 386
Hydrogen Sulphide (H2S) 34 1.32 349 1.28 345 1.80k=1.8 387
Kb =Methane
Backpressure
(CH4) correction 16 1.31 348
factor. 1.30 347 1.82 388
Methyl Mercaptan (CH4S) 48.1 1.20 0.88 337 1.32 349 1.84k=2.0 390
k =n-Butane
Ratio of specifications
(C4H10) 58 1.09 326 1.34 351 1.86 391
Natural Gas (SF=0.60) 17.4 1.27 344 1.36 352 1.88 392
Nitrogen (N2) 28 1.40 0.86 356
1.38 354 1.90 394
Oxygen (O2) 32 1.40 0.4
356 0.45 0.5 0.55 0.6 0.65 .70
1.40 356 1.92 395
Pentane (C5H12) 72 1.97 323 P2/P1 = Absolute
1.42 Pressure
358 Ratio at 1.94 397
Propane (C3H8) 44 1.13 330 1.44 359 1.96 398
Propylene (C3H6) 42 1.15 332 1.46 361 1.98 399
Propylene Oxide (C3H6O) 58.1 1.21 338 1.48 363 2.00 400
Steam 18 1.31 348 1.50 364 2.02 401
Sulphur Dioxide (SO2) 64 1.29 346
VCM (C3H3CI) 62.5 1.18 335
1
0.98
k=1.0
0.96
Backpressure Factor, Kb
k=1.2
0.94 Kb = Backpressure
Backpressure correction
correction factor
k=1.4 factor.
0.92
k=1.6
Ratio of
k = Ratio of specifications
Specific heats
0.9
k=1.8
CS1 — 285 [19.7] 260 [17.9] 230 [15.9] 200 [13.8] 170 [11.7]
150#
SS 2 275 [19.0] 275 [19.0] 240 [16.6] 215 [14.8] 195 [13.5] 170 [11.7]
CS — 740 [51.0] 675 [46.6] 655 [45.2] 635 [43.8] 600 [41.4]
300#
SS 720 [49.6] 720 [49.7] 620 [42.8] 560 [38.6] 515 [35.5] 480 [33.1]
CS — 1480 [102.1] 1350 [93.1] 1315 [90.7] 1270 [87.6] 1200 [82.8]
600#
SS 1440 [99.3] 1440 [99.3] 1240 [85.5] 1120 [77.2] 1030 [71.0] 955 [65.9]
CS — 2220 [153.1] 2025 [139.6] 1970 [135.8] 1900 [131.0] 1795 [123.8]
900#
SS 2160 [149.0] 2160 [149.0] 1860 [128.3] 1680 [115.8] 1540 [106.2] 1435 [99.0]
CS — 3705 [255.5] 3375 [232.7] 3280 [226.2] 3170 [218.6] 2995 [206.6]
1500#
SS 3600 [248.2] 3600 [248.2] 3095 [213.4] 2795 [192.7] 2570 [177.2] 2390 [164.8]
CS — 6170 [425.4] 5625 [387.8] 5470 [377.2] 5280 [364.1] 4990 [344.1]
2500#
SS 6000 [413.7] 6000 [413.7] 5160 [355.8] 4660 [321.3] 4280 [295.1] 3980 [274.5]
Notes
1. CS: A216, Grade WCB
2. SS: A351, Grade CF8M
BUNA-N -65 [-54] +275 [135] 15 [1.03] 15 [1.03] 3750 [425.5] 3750 [425.5]
Fluorocarbon -20 [-29] +400 [205] 15 [1.03] 15 [1.03] 3750 [425.5] 3750 [425.5]
Ethylene Propylene -65 [-54] +325 [163] 15 [1.03] 15 [1.03] 3750 [425.5] 3750 [425.5]
PFTE -423 [-253] +500 [205] 15 [1.03] 50 [3.45] 1480 [102.1] 1480 [102.1]
PEEK -423 [-253] +515 [268] 156 [10.8] — 740 [51.0] —
Page 11
How to Order a Valve
Special Requirements
Specify the details of any special processes,
tests or inspection procedures required
during valve manufacturing.
Page 12
9300 Series Pilot Valve Model Numbering
Determining the Model Number
Example given: Standard Model 93-S-05-1-0-0 — Model number represents a snap action pilot valve with fluorocarbon seals set at
150 psi.
93-______-______-______-______-______
OPTIONS
SPRING RANGE
PILOT TYPE
SEAT MATERIAL
PILOT TYPE
S = SNAP
M = MODULATING
E = ELECTRIC
SPRING RANGE
00 = 15 - 24
01 = 25 - 34
02 = 35 - 52
03 = 53 - 80
04 = 81 - 120
05 = 121 - 182
06 = 183 - 275
07 = 276 - 410
08 = 411 - 615
09 = 616 - 920
10 = 921 - 1150
11 = 1151 - 1480
12 = 1481 - 2160
13 = 2161 - 3240
14 = 3241 - 3750
SEAT MATERIAL
1 = FLUOROCARBON
2 = TFPE
3 = PC BUNA
4 = EDPM
X = OTHER
OPTIONS
0 = NONE
1 = DIFFERENTIAL SENSING FILTER
2 = REMOTE PRESSURE SENSOR
3 = PRESSURE SNUBBER
4 = TEST GAG
5 = BACKFLOW PREVENTOR FOR FULL BORE
6 = REMOTE VALVE LIFT INDICATOR
8 = PILOT VENT CONNECTED TO MAIN VALVE OUTLET
9 = DUAL PILOT VALVES
Page 13
9300 Series Main Valve Model Numbering
93-___-___-___-___-___-___-___-___
SERVICE
OUTLET CLASS
SEAT MATERIAL
INLET OUTLET SIZE
INLET CLASS
BODY MATERIAL
ORIFICE
FLANGE TYPE
ORIFICE SERVICE
D L 0 = STANDARD
E M 4 = NACE
F N
G P SEAT MATERIAL
H Q 1 = FLUOROCARBON
J R 2 = TFPE
K T 3 = PC BUNA
FB 4 = EPDM
5 = PEEK
INLET X = OTHER
OUTLET SIZE
1 = 1” X 2” BODY MATERIAL
2 = 1 1/2” X 2” 1 = CARBON STEEL
3 = 1 1/2” X 3” 2 = STAINLESS STEEL
4 = 2” X 3” 3 = OTHER
5 = 3” X 4”
6 = 4” X 6” FLANGE TYPE
7 = 4” X 6” X 6” 0 = RF X RF
8 = 6” X 8” 1 = RF X RTJ
9 = 6” X 8” X 8” 2 = RTJ X RF
10 = 8” X 10” 3 = RTJ X RTJ
11 = 8” X 10” X 10” 4 = OTHER
12 = LARGER CONNECTIONS SEE FACTORY
OUTLET CLASS
INLET CLASS 1 = 150 LB.
1 = 150 LB. 2 = 300 LB.
2 = 300 LB. 3 = 600 LB.
3 = 600 LB.
4 = 900 LB.
5 = 1500 LB.
6 = 2500 LB.
Page 14
Pilot Main Valve Exploded & Cutaway for API Orifice
Pilot Main Valve Exploded & Cutaway for Full Bore Orifice
13
Part # Qty Description Standard Optional
Materials Materials 1
01 1 Valve Bonnet CS
02 1 Valve Body CS
03 1 Piston Guide SS 316 SS 5
11
04 1 Valve Piston 316 SS T6 Alum
05 1 Seat Holder 17-4 PH SS 316 SS
06 1 Seat Insert TFPE/FC ++ 2
6
07 1 Nozzle 316 SS N/A 3
08 1 Pitot Tube 316 SS N/A
7
09 1 2-134 O-Ring FC ++
10 1 2-224 O-Ring FC ++ 8 12
11 2 2-231 O-Ring FC ++
12 1 Spring 302 SS 316 SS
9 4
13 6 Hex Bolt CS
Page 15
Pilot Valve Exploded & Cutaway Views
28
Pilot Valve - Exploded View
26
24
27
25
23
24
3
22
21 2
19
37
20 29 37
18
16 31
30 31
32 33 14
17
38 11
15 12
10
13
39 Pilot Valve
5 Cutaway View
6
7
Page
Page _____
_____ of
of _______
_______ Sheet No. ___________ Requistion No. ____________ Job No. _____________
Date _______________ Revised _____________ By _________________
General
1. Item Number
2. Tag Number
3. Series Type
Connections
4. Size (Inlet / Outlet)
5. Flange class, ANSI
6. Type Face
Materials
7. Body
8. Seat / Disk
9. Seals (Elastomer)
10. Guide
11. Spring
Accessories
12. Lift Lever (plain / packed)
Basis of Selection
13. Code
14. Fire
15. Other
Service Conditions
16. Fluid / State
17. Required capacity and units
18. Molecular weight or specific gravity
at flowing temperature
19. Viscosity at flowing temperature and units
20. Operating pressure / Set pressure
21. Backpressure (Constant or Variable)
22. Backpressure and units
23. Allowable overpressure and units
24. Compressibility factor
25. Ratio of specific heats
Orifice Area
26. Calculated and units
27. Selected and units
28. Orifice designation
Comments