|
 |
A switchover
system provides an uninterrupted supply of gas from a cylinder
or a bank of cylinders. A typical switchover system consists of
two gas sources (either two cylinders, or two banks of cylinders
connected by manifolds), two regulators, and a common discharge
line. One regulator is set to deliver gas at a higher pressure
than the other side. The side with the higher delivery pressure
will discharge gas first. When the cylinder pressure of the
active cylinder drops to the pressure set on the reserve
cylinder, the reserve side will start to deliver gas; thus,
‘switchover’ automatically occurs. The operator can then
change the empty cylinder(s) and initiate the process again.
Matheson's
5200 Series Switchover Systems incorporate the two individual
regulators into a unique, single body design. Only one regulator
requires adjustment, making these systems simple and convenient
to operate.
|
| 5230/5240
Series Switchover Systems |
| The
5230/5240 Series Switchover Systems are designed for High Purity
continuous delivery of gases, mixtures, or vapor phase of
liquefied gases with vapor pressures above 300 psig. The
5230/5240 Series are complete Switchover Systems for cabinet or
wall mounting with 24 standard designs that allow various outlet
pressures, choice of material and other standard options.
The Brass
5230 and Stainless Steel 5240 Series Switchover Systems are
applicable for non-corrosive gases. In High Purity applications
or when using hazardous gases, it is recommended to incorporate
a purge to prevent atmospheric contamination of the system.
|
| Benefits |
| The unique
design allows easy operation. After the primary cylinder (bank)
is depleted, the system switches automatically to the secondary
cylinder (bank). Simply turn the handle towards the full
cylinder (bank) to switch priority, close the cylinder valve(s)
and the inlet valve(s) where applicable, change the empty
cylinder(s) and open the valve(s). Purity and safety are
increased by eliminating potential inboard and outboard leaks. |
 |
[Larger Picture]
| Design
Features/Components |
- Employs
Model 3900 Series Switchover Regulator
- Brass
barstock or 316 stainless steel body
- Compact-single
body design
- In-body
porting eliminates numerous connections
- One knob
operation to switch cylinder priority
- Knob
position indicates cylinder priority
- No
levers or cams to cause mechanical problems
- Helium
leak rate of 2 x 10-8 scc/sec
- Stainless
steel diaphragms with metal to metal seal
- Custom
outlet pressure ranges on request
- Models
with standard outlet pressure regulator
- Models
with standard inlet diaphragm valves
- Option
of pigtail/CGA with or without check valve (ordered
separately)
- Option
of stainless steel flex hose/CGA with or without check valve
(ordered separately)
|
|
| Model
5230 Brass Switchover Systems |
|
Ordering
Information
|
|
With
Brass Switchover Regulator Model 3936
|
|
Model
Number
|
Steel
Panel |
Brass
Inlet Valves |
Line
Regulator |
Inlet
CGA |
Shipping
Weight lbs |
Model
3421
30 psig |
Model
3423
100 psig |
| 5230
|
1 |
-- |
-- |
1 |
346 |
10
lbs |
| 5231
|
-- |
-- |
-- |
1 |
346 |
8
lbs |
| 5232
|
1 |
-- |
1 |
-- |
346 |
10
lbs |
| 5233
|
-- |
-- |
1 |
-- |
346 |
8
lbs |
| 5234
|
1 |
-- |
-- |
-- |
346 |
8
lbs |
| 5235
|
-- |
-- |
-- |
-- |
346 |
5
lbs |
| 5230V
|
1 |
2 |
-- |
1 |
346 |
15
lbs |
| 5231V
|
-- |
2 |
-- |
1 |
346 |
12
lbs |
| 5232V
|
1 |
2 |
1 |
-- |
346 |
15
lbs |
| 5233V
|
-- |
2 |
1 |
-- |
346 |
12
lbs |
| 5234V
|
1 |
2 |
-- |
-- |
346 |
12
lbs |
| 5235V
|
-- |
2 |
-- |
-- |
346 |
8
lbs |
|
|
Model 5232
Note: cylinders and pigtails supplied separately. |
Model 5230V
Note: cylinders and pigtails supplied separately. |
| Rigid
Pigtails or Flex Hoses |
| Pigtails/Flex
Hoses No. Units Required |
Model |
Description |
Brass
System Inlet Connections |
Brass
Check Valve |
| 2 |
5390-CGA
† |
5/16"
tube Brass |
CGA 346
female |
-- |
| 2 |
5391-CGA† |
5/16"
tube Brass |
CGA 346
female |
1 |
| 2 |
5380-CGA
† |
SS Flex Hose |
CGA 346
female |
-- |
| 2 |
5381-CGA† |
SS Flex Hose |
CGA 346
female |
1 |
| †Allowable
Brass CGA connections -- 296, 320, 326, 346, 540, 555, 580, and
590 |
Allowed
with use limited:
| 510
(Not for acetylene) |
| 350
(Not for pyrophorics) |
| 660
(Freon mixtures only) |
|
| Please
order Matheson Technical BulletinTB-255 for additional
information. |
|
| Brass
Model 5238 and Stainless Steel Model 5248 Vented Switchover Systems |
| Ordering
Information |
| Brass
Model 5238 and Stainless Steel Model 5248 Vented Switchover
Systems |
| Model
No. |
Steel
Panel |
Line
Regulator 100 psig |
Brass
Valves |
SS
Valves |
Inlet
Connection |
Shipping
Weight lbs |
| 5238
|
1 |
1 |
1 |
|
346 |
17
lbs |
| 5248
|
1
|
1
|
|
1
|
665
|
17 lbs
|
|
| Model
5240 Stainless Steel Switchover Systems |
| Ordering
Information |
| With
SS Switchover Regulator Model 3946 |
| Model
Number |
Steel
Panel |
SS
Inlet Valves |
Line
Regulator |
Inlet
Fitting Number |
Shipping
Weight lbs |
| Model
3230 30 psig |
Model
3231 100 psig |
| 5240
|
1 |
-- |
-- |
1 |
665 |
10
lbs |
| 5241
|
-- |
-- |
-- |
1 |
665 |
8
lbs |
| 5242
|
1 |
-- |
1 |
-- |
665 |
10
lbs |
| 5243
|
-- |
-- |
1 |
-- |
665 |
8
lbs |
| 5244
|
1 |
-- |
-- |
-- |
665 |
8
lbs |
| 5245
|
-- |
-- |
-- |
-- |
665 |
5
lbs |
| 5240V
|
1 |
2 |
-- |
1 |
665 |
15
lbs |
| 5241V
|
-- |
2 |
-- |
1 |
665 |
12
lbs |
| 5242V
|
1 |
2 |
1 |
-- |
665 |
15
lbs |
| 5243V
|
-- |
2 |
1 |
-- |
665 |
12
lbs |
| 5244V
|
1 |
2 |
-- |
-- |
665 |
12
lbs |
| 5245V
|
-- |
2 |
-- |
-- |
665 |
8
lbs |
| Rigid
Pigtails or Flex Hoses |
| Pigtails/Flex
Hoses No. Units Required |
Model |
Description |
SS
System Inlet Connections |
SS
Check Valve |
| 2 |
5490-CGA
* |
1/4"
tube SS |
No. 665
female |
-- |
| 2 |
5491-CGA
* |
1/4"
tube SS |
No. 665
female |
1 |
| 2 |
5480-CGA
* |
SS Flex Hose |
No. 665
female |
-- |
| 2 |
5481-CGA
* |
SS Flex Hose |
No. 665
female |
1 |
| *Allowable
SS CGA connections - 296, 320, 326, 346, 540, 555, 580, and 590 |
Allowed
with use limited:
| 330
(Not for flex hose) |
670
(High pressure mixes only) |
| 350
(Not for pyrophorics) |
678
(High pressure mixes only) |
| 510
(Not for acetylene) |
705
(High pressure mixes only) |
| 660
(High pressure mixes only. Not for flex hose) |
|
|
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