INSTRUCTIONS for
R-5700 HIGH CAPACITY
PIPELINE - STATION REGULATORS
These INSTRUCTIONS are for experienced operators who are familiar with the principles of operation
and safe practices in handling gases and gas regulation equipment. If you are not sure that you under-
stand the principles fully, your ESAB representative can supply you with additional instructions.
SPECIFICATIONS
Delivery Delivery Max. Capacity*
Pressure Pressure for Nitrogen
Regulator Range, Gauge, ft
3
/hr ( L/min )
psig psig “C” Size 1/2" NPT
Model Part No. (kPa) (kPa) Outlet Outlet
R-5701 639628 0-15 0-30 2,000 6,000
(0-103) (0-207) (945) (2830)
R-5702 639629 0-75 0-100 6,000 13,000
(0-517) (0-690) (2830) (6150)
R-5703 639630 0-150 0-200 10,000 13,000
(0-1035) (0-1380) (4720) (6150)
R-5704 2224525 0-150 0-200 10,000 13,000
** (0-1035) (0-1380) (4720) (6150)
* Capacity will depend on the inlet and delivery pressures, outlet restriction,
and type of gas used (see capacity curves on pg. 2). For other gases, multiply
the given nitrogen flow rate by the following correction factors:
** R-5704 is an all brass body regulator.
acetylene 1.03 hydrogen 3.68
air 0.97 methane or natural gas 1.31
argon 0.83 oxygen 0.92
carbon dioxide 0.79 propane 0.79
helium 2.61
NOTE: Piped or distributed acetylene pressure should
never exceed 15 psig (103 kPa).
Gas Service: Any non-corrosive industrial gas.
Max. Inlet Pressure: 400 psig (2760 kPa).
Inlet and Outlet Connections: 1/2-in. — 14 NPT fe-
male.
Operating Temp. Range: -40 to 160° F; (-40 to 71° C).
Dimensions: 3-1/2-in. dia. x 6-1/2-in. (89 mm dia. x
165 mm).
Weight: 3 Ibs ( 1.4 kg)
DESCRIPTION
The R-5700 Series Regulators were designed for high
capacity service, such as multiple-torch or multi-station
operations or a single equipment requiring high gas
consumption. They can be installed for either station ser-
vice or for supplying gas through a pipeline. The 1/2-in.
NPT inlet and outlet female connections are “in-line” or
180° apart, as well as the 1/4-in. NPT gauge ports. Each
regulator is equipped with one delivery pressure gauge
with the other gauge port plugged. The gauge and the
pipe plug may be interchanged if a more convenient read-
ing position is desired after installation.
NOTE: If regulator is to be used for supplying oxygen
or a fuel gas from a station outlet for an oxy-fuel
gas process, a suitable shut-off valve and check
valve (or hydraulic back-pressure valve for fuel
gas if desired) must be installed between sta-
tion outlet and regulator to prevent possible
backflow. For additional information, refer to the
latest National Fire Protection Association’s
Standard, NFPA No. 51.
OPTIONAL ACCESSORIES
Shutoff Valve (V-35, P/N 998210; V-53, P/N 639674;
or V-54, P/N 998184) and CV-5 Check Valve Adaptor
(P/N 639717); Available to meet the latest requirements
of NFPA No. 51 when using an R-5700 regulator for sta-
tion service. The V-35 and V-53 are in-line, ball-seat type
valves with 3/4-in. NPT female connections that fully
opens on 1/4 turn of the handle. The V-35 has replace-
able seat seals. The V-54 is a 90° throttle type valve
with 3/4-in. NPT male inlet and female outlet. The CV-5
is a 3/4-in NPT male x 1/2-in. NPT male adaptor with a
built-in check valve for coupling any of the shutoff valves
to an R-5700 regulator.
Hose Outlet Adaptor: The following 1/2-in. NPT male x
“C”-size adaptors are available for connecting “C”-size
hose from outlet of regulator to the gas using equip-
ment:
Oxygen (7/8 - 14 male R.H.) ...............................P/N 18Z55
Fuel Gas (7/8 - 14 male L.H.) .............................P/N 18Z08
F-12-513-B
August, 1995
Be sure this information reaches the operator.
You can get extra copies through your supplier.
150
125
100
75
50
25
0
0
2000
4000
6000 8000
10,000
12,000
NITROGEN FLOW RATE, CU. FT. / HR.
MAX. DELIVERY PRESS.
R-5703 & R-5704
MAX. DELIVERY PRESS.
R-5702
50 PSIG
INLET
100 PSIG
INLET
MAX. DELIVERY PRESS.
R-5701
200 PSIG
INLET
300 PSIG
INLET
400 PSIG
INLET
1/2" NPT, SCH. 40 OUTLET (0.622" I.D.)
"C" SIZE OUTLET (0.328 I.D.)
DELIVERY PRESSURE, PSIG
2. When making the initial delivery pressure adjustment,
all valves downstream of the regulator must be open
if you wish to get a true working-pressure reading on
the delivery-pressure gauge.
IMPORTANT: Before starting operations, test all con-
nections with a Leak Test Solution that is
suitable for oxygen service, such as P/N
998771 (8 oz. container). Correct any
leaks before starting work. Testing should
be performed after torch or other gas-
using device has been properly con-
nected, with valve(s) downstream of
regulator closed, and with maximum de-
livery pressure (see table) in the delivery
line.
To Release Pressure:
If operations are to be stopped for a half-hour or more,
you should release all pressure from regulator. To do
this, proceed as follows:
1. Close the station valve.
2. Open all valves downstream of the regulator.
3. Wait until the pressure has dropped to zero, then back
out the pressure-adjusting screw until it turns freely.
NOTE: If a regulator is to be out of use for a few days or
more, turn in the pressure-adjusting screw
enough to move the valve stem off the seat.
When the regulator is returned to use, be sure
to back off the pressure-adjusting screw un-
til it turns freely before pressure is admitted
to the regulator.
REPAIR SERVICE
Regulators in need of repair should be returned to your
ESAB distributor or to ESAB Remanufacturing Center,
Ebenezer Road Florence, SC 29501.
If you have your own properly equipped and staffed re-
pair facility, repair parts information (Form 12-524) for
this regulator is available on request to your distributor.
Inert Gas (7/8 - 14 female R.H.) .......................P/N 639377
INSTALLATION
Since the regulators are provided with pipe connec-
tions for direct attachment to any pipeline, a respon-
sible person must determine that a regulator is in-
stalled in the correct, properly labeled pipeline. Also
a regulator must not be changed from one gas ser-
vice to another until a responsible person has de-
termined that it is safe to do so.
Make sure all gas carrying piping and apparatus is
free of oil and grease before installing the regulator,
particularly when using oxygen. OIL AND GREASE
ARE EASILY IGNITED AND BURN VIOLENTLY IN THE
PRESENCE OF OXYGEN UNDER PRESSURE.
Apply a single turn of Teflon tape to the male pipe
threads before making the pipe connections. Tighten
all connections firmly with a wrench. Ref.: MIL-T-
27730A (ASG).
For Station Service:
1. Install the V-35. V-53, or V-54 shut-off valve to station
outlet. (If station outlet is other than 3/4-in. pipe use
suitable adaptors, bushings, etc.) and then the 3/4-
in. NPT end of the CV-5 check valve to the shut-off
valve.
2. Close the shut-off valve and turn on the gas supply.
3. Open the shut-off valve slightly, for an instant. (This is
termed as ‘cracking the valve’.) This will blow out dust
or dirt that may have collected in the station outlet.
Never crack a fuel gas valve near sparks, flames,
or any other possible source of ignition.
4. Connect the inlet of the regulator directly to the check
valve .
5. MAKE SURE the regulator pressure adjusting screw
is released by turning it counterclockwise until it turns
freely .
6. Connect hose adaptor to the outlet of the regulator
then attach hose from outlet to the gas using equip-
ment.
7. Open the shut-off valve SLOWLY and the regulator
is ready to operate.
Never stand in front of or behind the regulator
when opening the valve. Always stand to one side.
For Pipeline Service:
If regulator is to be used for supplying gas to a pipeline,
it is not necessary to install a shut-off valve and check
valve upstream of regulator. Follow the same sequence
as described for station service installation where ap-
propriate. Make sure “IN” connection of the regulator is
installed on the gas supply line and the delivery line is
connected to the “OUT” connection.
OPERATION
To Adjust Pressure:
1. To increase delivery pressure, turn the pressure-ad-
justing screw clockwise. To decrease delivery pres-
sure, turn the pressure adjusting screw counterclock-
wise.
Capacity Curves - R-5700 Series Regulators
F-12-513-B 8/95 3M Printed in U.S A.
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