3. Rockwood
Swendeman
can provide QUALITY
you with PRICE
reliable, high LEAD TIME
quality safety
relief valves, at
the most Air Liquide America,
Houston, Texas, has standardized
the Rockwood Swendeman CryoTree ™
competitive assembly as part of their ongoing cost
reduction programs to serve customers more
price in the effectively. Air Liquide has stated that although
the total cost of the Rockwood Swendeman
industry and CyroTree parallels their internal fabricated design
™
used in the past, their fabrication time can now be
spent in other areas. Originally five to six separate
our lead time purchase orders were issued for individual
components. It now requires only one.
on most This modular design provides only two
part numbers for their complete tank
orders is three inventory providing standardization
on a global basis.
weeks or less.
–2–
4. A CRYOGENICS COMPANY
Designed and manufactured with a commitment to quality and service
with over 50 years of experience in the cryogenic and gas industry.
Rockwood Swendeman valves are guaranteed against defects in material or workmanship for a
period of one year. Any valve claimed to be defective may be returned to us, on receipt of our
written consent, for examination. If in our opinion the valve is defective it will be repaired or
replaced F.O.B. our plant. Under no circumstances does Rockwood Swendeman assume
responsibility for consequential damages, labor, repair or other expenses.
Any adjustments or repairs should be done by Rockwood Swendeman at
our facility. We have 50 plus years experience as a world leader in the manufacture and
assembly of reliable safety relief valves for the industrial gas industry. Today many multi-
national firms in the industry rely on quality Rockwood Swendeman valves. We manufacture
bronze and stainless steel valves for air, gas and liquid service.
visit our website at: www.rockwoodswendeman.com
AAR
ss Member
TUV
ANLAGEN UNO UMWELT
Compressed
Gas
Association AAR
–3–
5. TYPE RXSO
0 - 400 psig
A CRYOGENICS COMPANY
BRONZE
SAFETY RELIEF VALVES
Features
• Special Teflon® seat, making bubble-tight
seals possible to over 90% of set
pressures per spec API 527; not
applicable to steam.
Technical Data • Adjustable blowdown ring
Operating Ranges • Meets AD-Merkblatt A2 certified by
Temperature ……………-423ºF to +400˚F • Cleaned and packaged for use in O2
Set Pressures ……………to 400 psig service in compliance with the CGA
specification G-4.1
Materials of Construction
Shell ………………………Cast Bronze, Additional cleaning specifications:
A.S.M.E SB-62 • 4WPI-SW70003 • ES.660.503
• GS-38 • GS-40
Base ………………………Forged Brass,
Alloy C37700
Trim ………………………Copper Alloy Application
Spring ……………………Stainless Steel • Especially recommended where noxious
17-7 PH A.S.T.M.,
A-313, Type 631 or expensive liquids or gases place a
premium on seal quality.
Tests
• Stationary Cryogenic storage tanks
Each valve is set, tested, retested and sealed at
the factory to the customer’s specifications. • Dual Safety relief systems
Sizes • Overpressure relief of tanks, pipelines,
Inlet - 1/2 inch to 2 inch vessels, pumps
Outlet - 3/4 inch to 2-1/2 inch • Air and gas compressors
• Corrosive industrial applications
Applicable Codes Options
Designed and manufactured to meet: • Large and Extra Large Capacity
• CGA S-1.2 and S-1.3. Consult factory for flow rates
• V-4301 (Cryogenic Non-Oxygen) • BSP threads are available on most sizes
• V-4401 (Oxygen)
• Lever operation
• ASME sec.VIII
• API 527
• AD-Merkblatt A2
• CRN 0G0591.9
–4–
7. TYPE RXSO-S
0 to 400 psig
A CRYOGENICS COMPANY
STAINLESS STEEL
SAFETY RELIEF VALVE
Features
• Special Teflon® seat, making bubble-tight
seals possible to over 90% of set
pressures per spec API 527; not
applicable to steam.
Technical Data • Adjustable blowdown ring
Operating Ranges • Cleaned and packaged for use in O2
Temperature ……………-423˚F to +400˚F service in compliance with the CGA
Set Pressures ……………to 400 psig specification G-4.1
Materials of Construction Additional cleaning specifications:
Shell ………………………Investment Cast 316SS, • 4WPI-SW70003 • ES.660.503
• GS-38 • GS-40
A.S.M.E SA-351
Base ………………………Investment Cast 316SS, • Electropolishing of base and proper
A.S.M.E SA-351 assembly for high purity and electronic
Trim ………………………316SS, A.S.M.E. SA-479 applications
Spring ……………………Stainless Steel
17-7 PH A.S.T.M., Application
A-313, Type 631 • Especially recommended where corrosive
Tests or expensive gases benefit from stainless
Each valve is set, tested, retested and sealed at steel construction.
the factory to the customer’s specifications. • Stationary Cryogenic storage tanks
Sizes • Dual Safety relief systems
Inlet - 1/2 inch to 1 inch • Overpressure relief of tanks, pipelines,
Outlet - 3/4 inch to 1-1/4 inch vessels, pumps
• Air and gas compressors
Applicable Codes
Designed and manufactured to meet:
Options
• CGA S-1.2 and S-1.3.
• V-4301 (Cryogenic Non-Oxygen) • Large and Extra Large Capacity
• V-4401 (Oxygen) Consult factory for flow rates
• ASME sec.VIII • BSP threads are available on most sizes.
• API 527
• AD-Merkblatt A2 • Lever operation
• CRN 0G0591.9
–6–
9. TYPE RSL
0 - 300 psig
A CRYOGENICS COMPANY
BRONZE & STAINLESS STEEL
SAFETY RELIEF VALVES
Features
• Teflon® seat for improved seat tightness
• Cleaned and packaged for use in O2
Technical Data service in compliance with the CGA
specification G-4.1
Operating Ranges
Additional cleaning specifications:
Temperature ……………………………0 to +300˚F
• 4WPI-SW 7003
Set Pressures …………………………to 300 psig
• GS-38
For use with back pressure services, please consult factory.
Materials of Construction
Applications
BRONZE
Shell . . . . .Cast Bronze, A.S.M.E. SB-62 • Tanks, pumps, pipe lines and other
Base . . . . .Forged Brass, Alloy C37700 vessels containing non-corrosive liquid,
Trim . . . . . .Copper Alloy and where large relieving capacities are
not required.
Spring . . . .Stainless Steel
17-7 PH A.S.T.M., A-313, Type 631
STAINLESS STEEL Options
Shell . . . . .Investment Cast 316SS, A.S.M.E SA-351
Base . . . . .Investment Cast 316SS, A.S.M.E SA-351 • BSP threads available on most sizes
Trim . . . . . .316SS, A.S.M.E. SA-479 • Lever operation
Spring . . . .Stainless Steel
17-7 PH, A.S.T.M., A-313, Type 631
Tests
Each valve is set, tested and retested at the
factory to the customer’s specifications.
Sizes
Bronze Inlet - 1/2 inch to 2 inches
Outlet - 3/4 inch to 2-1/2 inch
Stainless Steel Inlet - 1/2 inch to 1 inch
Outlet - 3/4 inch to 1-1/4 inch
–8–
11. DIVERTER VALVE
0 - 600 psig
A CRYOGENICS COMPANY
FULL FLOW
DIVERTER VALVE
Features
• Engineered for maximum safety and
reliability
• Full flow manifold ends
Technical Data • Medical level O2 cleaning in conformance
with CGA G-4.1
Operating Ranges • 180 degree operation
Temperatures ……………-423ºF to 400ºF • Handle indicates flow direction
Set Pressures ……………to 600 psig
• Low maintenance
Materials of Construction • Blow out proof stem
Body ………………………Bronze B61
• V-ring stem packing
End Plate ………………Bronze B61
Ball ………………………Bronze • All stainless externals
Stem ………………………316SS
Applications
Seats ……………………MTFE
Body Seals ………………TFE • Dual safety relief systems
Stem Seals ………………CTFE
• Stationary cryogenic tanks
Stem Bearing ……………TFE
• Manifolding
Bellville Wsh ……………17-7 SS
External Hdwe …………300 Series SS • Distribution systems
• Process systems
Sizes
Available in 3/4 inch F to 1 inch F • Liquid and Gaseous Cryogenic
Applications
Applicable Codes
Designed and manufactured to meet:
• ANSI B31.3, B16.34
– 10 –
12. Dimensions & Characteristics DIVERTER VALVE
HIGH FLOW DIVERTER VALVE CV VALUES* B
Safety Relief Valve Outlet Rupture Disc Outlet Torque C
CV@ CV@ CV@ CV@
Sizes mid position full open mid position full open Max.
(inches) (90°) (180°) (90°) (180°) Value
⁄4F
3
9.2 8.2 10.7 8.1 200 in. lbs.
1F 25.3 18.3 16.4 14.0 300 in. lbs.
* Flows may vary slightly due to outlet connection sizes.
A
DIMENSIONS (inches)
Size A B C D
D
⁄4F
3
13.00 9.38 7.25 7.75
1F 17.66 11.61 8.73 12.00
Dimensions for reference only
HIGH FLOW DIVERTER VALVE Cv GRAPH
50.0
45.0
40.0
35.0
30.0
C V
25.0
20.0
15.0
10.0
5.0
0.0
10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
P E R C E N T O P E N
1F 3
⁄4F
TO ORDER: See Page 14
– 11 –
13. CRYOTREE™
0 - 400 psig
A CRYOGENICS COMPANY
SAFETY RELIEF VALVE
SUB-ASSEMBLY
Features
• Dual safety relief systems engineered for
maximum safety and reliability
• Easy system installation
Technical Data • Includes high capacity safety relief valves,
full flow diverting valve, rupture discs,
Temperatures ……………-423ºF to 400ºF bleed valves, and related piping assembled
Set Pressures ……………to 400 psig • Standardized components
Materials • Low maintenance
Body ………………………Bronze B61
• Eliminates the need to shut down and
End Plate ………………Bronze B61 evacuate the tank for service
Ball ………………………Bronze
• Minimizes pressure drop in system
Stem ………………………316SS
• Medical level O2 cleaning in conformance
Tests with CGA G-4.1
Hydrostatically tested as a complete unit to assure
leak tightness • Sealed in 6 mil poly bags to eliminate
contamination prior to installation
Sizes • Handle indicates flow direction
Available in 3/4 inch F to 1 inch F
Applications
Applicable Codes • On stationary cryogenic storage tanks to
isolate safety relief valves and rupture
Designed and manufactured to meet: discs in the event they need to be serviced
• CGA S-1.2 and S-1.3.
• ASME Sec.VIII
• API 527 Rockwood Swendeman’s CryoTree™ assemblies
• AD -Merkblatt A2 are manufactured for use on stationary cryogenic
• ANSI B31.3, B16.34 storage tanks to isolate safety relief valves and
rupture discs in the event they need to be
serviced. Utilizing this system eliminates the need
to shut down and evacuate the tank for service.
This modular assembly provides for just a single
connection to the internal tank piping.
– 12 –
14. Dimensions & Characteristics CRYOTREE™
HIGH FLOW DIVERTER VALVE CV VALUES*
Safety Relief Valve Outlet Rupture Disc Outlet
CV@ CV@ CV@ CV@
Size mid position full open mid position full open
(inches) (90°) (180°) (90°) (180°)
3
⁄4F 9.2 8.2 10.7 8.1
1F 25.3 18.3 16.4 14.0
Flows may vary slightly due to outlet connection sizes.
DIMENSIONS - INCHES
SIZE A B C
3
⁄4F 5.9 22.5 14.8
1F 8.7 25.7 16.5
Dimensions for reference only.
HIGH FLOW DIVERTER VALVE Cv GRAPH
50.0
45.0
40.0
35.0
30.0
C V
25.0
20.0
15.0
10.0
5.0
0.0
10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
P E R C E N T O P E N
1F ⁄4F
3
TO ORDER: See Page 14
– 13 –
15. A CRYOGENICS COMPANY
SAFETY RELIEF VALVES
How To Order
Sample: 710 N B D E - A 025
MODEL NUMBER SET PRESSURE
710 - RXSO Bronze ASME coded with O2 cleaning
715 - RXSO Bronze coded with O2 cleaning VALVE SERVICE (For Set Valves)
760 - RXSO-S Stainless Steel RXSO with O2 cleaning A - Air / Gas Sec. VIII
770 - RSL Bronze Non ASME coded with O2 cleaning N - Air / Gas / Liquid Non Code
775 - RSL SS Non ASME coded with O2 cleaning E - Air / Gas
Z - Other
CAP
N - Plain Cap OUTLET SIZE (inches)
E - Open Lever D - 3/4
E - 1
ORIFICE F - 1-1/4
A - 0.750 G - 1-1/2
B - 1.000 H - 2
C - 1.250 J - 2-1/2
D - 1.500
E - 2.000 INLET SIZE (inches)
C - 1/2 F - 1-1/4
D - 3/4 G - 1-1/2
E - 1 H - 2
DIVERTER AND CRYOTREE™
How To Order CRYOTREE only
Sample: 790 D F D C A B-E B 250
MODEL NUMBER SET PRESSURE
780 - Diverter Valve
790 - CryoTree™ SRV ORIFICE
A - 0.750
DIVERTER VALVE SIZE (inches) B - 1.000
D - 3/4 C - 1.250
E - 1 D - 1.500
E - 2.000
ORIFICE
F - Full SRV OUTLET
D - 3/4
E - 1
TOP PORT (inches)
F - 1-1/4
D - 3/4 H - 2
E - 1
F - 1-1/4
MATERIAL
BOTTOM PORT (inches) B - Bronze with 316 Stem
A - 1/4 E - 1
B - 3/8 F - 1-1/4 SIDE PORT (inches)
C - 1/2 G - A - 1/4 D - 3/4
D - 3/4 B - 3/8 E - 1
C - 1/2 F - 1-1/4
SC RS/0604
– 14 –
16. A CRYOGENICS COMPANY
150 COLDENHAM ROAD, WALDEN, NEW YORK 12586-2035
845.778.7053 • Fax 845.778.7123
www.rockwoodswendeman.com
