Bulletin 51.1:RSS
January 1999
Design RSS Lined Globe Valve The Design RSS lined globe-style valve (figure 1) has pure-modified (reinforced) PTFE trim parts, pushdown-to-close action, and positive shutoff. The sophisticated PTFE trim has replaced the previously used glass-filled or carbon-filled standard PTFE trim without any loss of mechanical or thermal properties and has improved the universal chemical resistance. This valve is for applications involving severely corrosive and toxic flowing media. Within its temperature and pressure limitations, the Design RSS valve body may be applied to most media. The Design RSS valve body provides an economical alternative to alloy valve bodies in a wide variety of applications.
Features D Fluid Compatibility—The PFA (perfluoroalkoxy resin)-lined assembly provides corrosion protection by shielding metal parts from the process media, making it ideal for controlling severely corrosive media.
D Economy—Because all metal parts are shielded from the process fluid, the use of expensive alloys is not necessary. D Liner Integrity—Lining thickness is a minimum of 5 millimeters at all areas where the valve is exposed to process flow (3.5 millimeters minimum thickness for 1/2 inch and 3/4 inch valves). Transfer molding techniques provide for excellent consistency, density, and low permeability. Transfer molded PFA material is translucent. This allows for checking of the entire wall surface for pin holes and cracks in the material during the manufacturing process.
W4453–1 / IL
Figure 1. Design RSS Valve with Type 667 Actuator and Type 3582 Positioner
Greater safety under vacuum and high temperature service is achieved by dovetail anchorings which provide a mechanical bond, effectively preventing detachment of the lining from the cast valve body. D Easy In-Line Maintenance—The top entry design eases in-line maintenance. This design also minimizes the transfer of pipeline stress, which minimizes leakage both at the valve body joint and seat ring. D Longer Life Bellows Seal—The PTFE bellows seal is leak tight and, with proper use and maintenance,can have an expected life cycle exceeding 500,000 full stroke cycles. The N10276 nickel alloy bellows seal, with proper use and maintenance, can have an expected life cycle of 10,000 cycles at full stroke, 100,000 cycles at 1/2 stroke, and 1,000,000 cycles at 1/4 stroke.
D101291X012
D Permeating Service—A heavy duty PTFE bellows with PTFE/carbon support rings is available for permeating service. Compared to a standard bellows, the heavy duty bellows design has an enhanced resistance to permeation (especially in combination with a Hastelloy C stem). This is due to a wall thickness of 0.1 inch (2.5 mm) and pressure retaining rings inside the bellows. An optional N10276 nickel alloy (Hastelloy C276) bellows seal is also available to meet the needs of severe service conditions.
Bulletin 51.1:RSS Specifications Valve Sizes
Expected Life Cycle
J 1/2, J 3/4, J 1, J 1-1/2, J 2, J 3, J and
For Standard PTFE bellows Full Stroke: 500,000 For N10276 Nickel Alloy Bellows Full Stroke: 10,000 1/2 Stroke: 100,000 1/4 Stroke: 1,000,000
4-inches Face-To-Face and Flange Compatibility DUCTILE IRON VALVE SIZE, IN.
STEEL
SST
Class 150
Class 150
Flange Class 150
Class 300
Face-To-Face ANSI(1) DIN(2) ANSI(1) DIN(2) ANSI(1) DIN(2) ANSI(1) DIN(2)
1/2 3/4 1 1-1/2 2 3 4
----X X X X X
X X X X X X X
----X X X -----
----X ---------
------------X
X X X X X X X
------------X
X X X X X X X
1. For ANSI/ISA face-to-face dimensions, see figure 3. 2. For DIN face-to-face dimensions, see figure 3.
Temperature Capabilities Pressure Service: –20 to 350_F (–29 to 177_C) Vacuum Service: –20 to 200_F (–29 to 93_C) Standard Flow Characteristic/Valve Plug Style Equal percentage Flow Direction Up through the seat ring (see figure 2) Flow Coefficients
Maximum Inlet Pressure and Temperature(1) See table 2 Maximum Shutoff Pressure and Temperature(1) See table 3
See table 1 and Fisher Controls Catalogs 10 and 12 Port Diameters See table 1 Maximum Valve Plug Travel See table 1
Maximum Outlet Pressure and Temperature(1) See figure 3
Bonnet Style Plain
Application Limits Liquid Service: For cavitating applications, contact your Fisher Controls sales office or sales representative. Gas Service: Velocity 0.33 MACH
Packing Arrangement Braided PTFE rings Yoke Boss and Stem Diameter See table 1
Shutoff Classification Class VI per ANSI/FCI 70-2 Bellows Seal J Standard PTFE or J Heavy-duty PTFE with PTFE carbon support rings or J N10276 (Hastelloy C276) See table 4 for pressure/temperature ratings Construction Materials See table 4
Approximate Weight See figure 4 Options J Bonnet tapped for a 1/8-inch NPT remote venting, purging, or for gauge mounting J Line-Flange gasket, (stainless steel insert, compression gasket, and PTFE overlay) with thickness of 0.20 (5.1 mm) for 1/2- through 2-inch sizes, and 0.28 inch (7.1 mm) for 3- and 4-inch size valves J Tool for removing and installing the seat ring
1. The pressure/temperature limits in this bulletin and any applicable standard or code limitation for the valve should not be exceeded.
2
Bulletin 51.1:RSS TRAVEL STOP/ LOAD LIMITER
SEE VIEW A
SEE VIEW B STANDARD PTFE OR N10276 NICKEL ALLOY
BELLOWS LOCKING ROPE SEE VIEW C
SEAT RING VALVE PLUG
LINER
W4521–3 / IL
BELLOWS
BELLOWS LOCKING ROPE
BELLOWS RETAINER
STEM
VALVE PLUG ASSEMBLY
LOCKING ROPE
SEAT RING
VALVE PLUG
BUSHING 40B4190–D
A3598–3 / IL
Figure 2. Design RSS Valve Details
3
Bulletin 51.1:RSS Table 1. Valve Size, Port Diameter (1), Maximum Flow Coefficient, Travel, and Stem and Yoke Boss Diameter VALVE SIZE
PORT DIAMETER
Inches
Inches
1/2 and 3/4
1
1-1/2 2 3 4
mm
LIQUID FLOW COEFFICIENT (Cv) AT MAXIMUM TRAVEL(2)
3/16 3/16 3/16 5/16 1/2 3/16 3/16 3/16 5/16 1/2 3/4 1
5 5 5 8 15 5 5 5 8 15 20 25
0.212(3) 0.462(3) 0.965(3) 2.09 4.52 0.212(3) 0.462(3) 1.02(3) 1.91 3.57 8.41 11.5
1 1-1/2 1-3/16 2 2 3 2-1/2 4
25 40 30 50 50 80 65 96
13.4 28.6 13.3 44.3 43.3 94.1 69.3 145
MAXIMUM VALVE PLUG TRAVEL Heavy Duty Bellows with Support Rings Inches
mm
N/A
N/A
5/8
15.9
3/4
19 1 19.1
1 1/8 1-1/8
28 6 28.6
STEM DIAMETER
Standard PTFE and Metal Bellows
YOKE BOSS DIAMETER
Inches
mm
Inches
mm
19.1
3/8
9.5
2-1/8
54
28 6 28.6
1/2
12 7 12.7
2 13/16 2-13/16
71
Inches
mm
3/4
1 1/8 1-1/8
1. Inch equivalents of these metric port diameters have been rounded to common fractional diameters. Actual diameter of the 15 millimeter port diameter is 0.591 inches, the 40 millimeter port diameter is 1.575 inches, and the 96 millimeter port is 3.780 inches. 2. KV = (0.865) (CV) 3. With the 3/16-inch port diameter, some variations of the flow coefficients is expected due to dimensional changes of the PTFE seat ring because of cold flow and thermal expansions.
Table 2. Maximum Allowable Inlet Pressures and Temperatures for All Class 150 and 300 Valves
TEMPERATURE, _F
PRESSURE, PSIG
PRESSURE, BAR
Ductile Iron Stainless TEMPERor Steel ATURE, _C Steel Valve Valve
Ductile Iron or Steel Valve
Stainless Steel Valve
19.7 17.9 15.9 14.8
19.1 16.3 14.2 13.3
–20 to 100 200 300 350
285 260 230 215
275 235 205 192
–29 to 38 93 149 177
Table 3. Maximum Shutoff Pressure Drop
4
Temperature _F
Pressure psi
Temperature _C
Pressure bar
–20 to 250 300 350
145 125 93
–29 to 121 149 177
10.0 8.6 6.4
Bulletin 51.1:RSS Table 4. Construction Materials Part
Standard Material
Optional Material
Valve Body
Ductile iron (ASTM A 395) with PFA(1) liner
Steel (DIN 1.0619) or stainless steel (DIN 1.4308) with PFA liner
Bonnet
Ductile iron
Steel or stainless steel
Bellows
PTFE
N10276 (Hastelloy C276) or heavy-duty PTFE with PTFE carbon support rings
Valve plug(2) and seat ring
Pure modified (reinforced) PTFE
- - -
Bonnet bushings
Carbon Graphite
- - -
Valve plug stem
Stainless steel
N06455 (Hastelloy C4)
Body-to-bonnet bolting
Stainless steel
N10276
Packing
PTFE
- - -
Packing follower and packing box ring
Stainless steel
N06455
Travel stop
Stainless steel
N06455
Locking rope
PTFE
- - -
Bonnet O-ring
Fluoroelastomer
- - -
Gasket (used with N10276 bellows)
PTFE
- - -
1. Perfluoroalkoxy resin. 2. The plug for a 3/16-inch (5 mm) port is made of N06455 nickel alloy or R05255 tantalum alloy, and attaches to the bellows with pure modified PTFE cap.
PFA LINING
68
122
212
302
356_F
PFA LINING
A6889-1 / IL
68
122
212
302
356_F
Figure 3. Downstream/Outlet Pressure Ratings
5
Bulletin 51.1:RSS DIN FACE-TO-FACE DIMENSIONS MATING WITH ANSI CLASS 150 FLANGES Valve Size Size, Inches
A
B
1/2 3/4 1 1-1/2 2 3 4
5.12 5.12 6.30 7.88 9.06 12.20 13.78
2.36 2.36 2.83 3.38 3.82 5.04 6.94
1/2 3/4 1 1-1/2 2 3 4
130.0 130.0 160.0 200.0 230.0 310.0 350.0
60.0 60.0 72.0 86.0 97.0 128.0 176.0
DIMENSIONS D
EO
5.57 5.57 7.83 8.66 8.98 13.00 13.39
3.50 3.86 4.53 5.91 6.50 7.87 8.66
141.5 141.5 199.0 220.0 228.0 330.0 340.0
89.0 98.0 115.0 150.0 165.0 200.0 220.0
Inches
Approximate Weight
ANSI/ISA CLASS 300 FACE-TO-FACE DIMENSIONS MATING WITH ANSI CLASS 300 FLANGES Valve Size Size, Inches
A
B
1 1-1/2 2
7.75 9.25 10.50
3.54 3.97 4.53
1 1-1/2 2
197.0 235.0 267.0
90.0 101.0 115.0
DIMENSIONS
Pounds
mm
13 13 23 38 43 86 92 Kg
Approximate Weight
D
EO
7.83 8.66 8.98
4.87 6.14 6.50
25 40 45 Kg
199.0 220.0 228.0
123.8 156.0 165.0
11 18 20
Inches
Pounds
mm
6 6 11 17 20 39 42
MATCH LINE FOR ACTUATOR
ANSI/ISA CLASS 150 FACE-TO-FACE DIMENSIONS MATING WITH ANSI CLASS 150 FLANGES Valve Size Size, Inches
A
B
1 1-1/2 2 3 4
7.25 8.75 10.00 11.75 13.78
3.27 3.82 4.21 4.76 6.94
1 1-1/2 2 3 4
184.0 222.0 254.0 298.0 350.0
83.0 97.0 107.0 121.0 176.0
DIMENSIONS D
EO
7.83 8.66 8.98 13.00 13.39
4.25 5.00 6.00 7.50 8.66
199.0 220.0 228.0 330.0 340.0
108.0 127.0 152.4 190.5 220.0
Inches
Approximate Weight Pounds
mm
23 36 43 86 92 Kg 10 17 20 39 42
10B47144–G A5216 / IL
Figure 4. Dimensions and Weights
Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. All other marks are the property of their respective owners. EFisher Controls International, Inc. 1985, 1999; All Rights Reserved
For information, contact Fisher Controls: Marshalltown, Iowa 50158 USA Cernay 68700 France Sao Paulo 05424 Brazil Singapore 128461 6
Printed in U.S.A.