ESAB R-6700 High Capacity Pipeline - Station Regulators Troubleshooting instruction

Brand: ESAB

Model: R-6700 High Capacity Pipeline - Station Regulators

Type: Troubleshooting instruction

ESAB R-6700 High Capacity Pipeline - Station Regulators are designed for high-capacity service, such as multiple-torch or multi-station operators or a single equipment requiring high gas consumption. They can be installed for either station service or for supplying gas through a pipeline. The 1/2-in. NPT inlet and outlet female connections are "in-line" or 180o apart, as well as the 1/4-in. NPT gauge ports. Each regulator is equipped with the delivery pressure gauge with the other gauge port plugged. The gauge and the pipe plug may be interchanged if a more convenient reading position is desired after installation.

SPECIFICATIONS

Delivery Delivery Max. Capacity

Pressure Pressure for Nitrogen

Regulator Range, Gauge, ft

/hr (L/min)

psig psig "C" Size 1/2" NPT

Model Part No. (bar) (bar) Outlet Outlet

R-6701 22234 0-15 0-30 2,000 6,000

(0-1.0) (0-2.1) (945) (2830)

R-6702 22235 0-75 0-100 6,000 13,000

(0-5.2) (6.9) (2830) (6150)

R-6703 22236 0-150 0-200 10,000 13,000

(0-10.3) (0-13.8) (4720) (6150)

R-6704 2227920 0-200 0-400 12,000 13,000

(0-13.7) (0-27.6) (5680) (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:

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 (1.0 bar).

Gas Service: Any noncorrosive industrial gas.

Max. Inlet Pressure: 400 psig (27.6 bar).

Inlet and Outlet Connections: 1/2-in.—14 NPT fe-

male.

Operating Temp. Range:–40 to160

F; (-40 to 71

C).

Dimensions: 3-in. dia. x 6-in. (89 mm dia. x 165 mm).

Weight: 4.8 lbs. (2.2 kg)

DESCRIPTION

The R-6700 Series Regulators were designed for high

capacity service, such as multiple-torch or multi-sta-

tion operators or a single equipment requiring high

gas consumption. They can be installed for either

station service or for supplying gas through a pipe-

line. The 1/2-in. NPT inlet and outlet female connec-

tions are "in-line" or 180

apart, as well as the 1/4-in.

NPT gauge ports. Each regulator is equipped with

the delivery pressure gauge with the other gauge port

plugged. The gauge and the pipe plug may be inter-

INSTRUCTIONS for

F-15-396-B

January, 2000

R-6700 HIGH CAPACITY

PIPELINE - STATION REGULATORS

Be sure this information reaches the operator.

You can get extra copies through your supplier.

changed if a more convenient reading position is de-

sired 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 be-

tween station 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-6700 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

replaceable 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-6700 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 "C" ................ (7/8 - 14 male R.H.)P/N 18Z55

Fuel Gas "C"...............(7/8 - 14 male L.H.)P/N 18Z08

Inert Gas "C"......... (7/8 - 14 female R.H.)P/N 639377

INSTALLATION

Since the regulators are provided with pipe con-

nections for direct attachment to any pipeline, a

responsible person must determine that a regula-

tor is installed in the correct, properly labeled pipe-

line. Also a regulator must not be changed from

one gas service to another until a responsible per-

son has determined that it is safe to do so.

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 understand the principles fully, your ESAB representative can supply

you with additional instructions.

Make sure all gas carrying piping and apparatus is

free of oil and grease before installing the regula-

tor, particularly when using oxygen. OIL AND

GREASE ARE EASILY IGNITED AND BURN VIO-

LENTLY 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 sta-

tion 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 igni-

tion.

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-

adjusting screw clockwise. To decrease delivery

pressure, turn the pressure adjusting screw coun-

terclockwise.

2. When making the initial delivery pressure adjust-

ment, 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 a has been properly

connected, 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 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 until 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,

411 S. Ebenezer Road, Florence, SC 29501.

NITROGEN FLOW RATE, CU. FT./HR.

Capacity Curves - R-6700 Series regulators

F-15-396-B 1/2000 2M Printed in U.S.A.

DELIVERY PRESSURE, PSIG

MAX. DELIVERY PRESS.

R-6703

300 PSIG

INLET

200 PSIG

INLET

MAX. DELIVERY PRESS.

R-6702

“C” SIZE OUTLET (0.328 I.D.)

100 PSIG

INLET

50 PSIG

INLET

MAX DELIVERY PRESS.

R-6701

400 PSIG

INLET

1/2" NPT. SCH. 40 OUTLET (0.622" ID.)

MAX. DELIVERY PRESS.

R-6704

ESAB R-6700 High Capacity Pipeline - Station Regulators Troubleshooting instruction

ESAB R-6700 High Capacity Pipeline - Station Regulators Troubleshooting instruction

ESAB R-6700 High Capacity Pipeline - Station Regulators Troubleshooting instruction

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