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

INSTRUCTIONS for
January , 2000
R-6700 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 understand the principles fully, your ESAB representative can supply you with additional instructions.
SPECIFICA TIONS
Delivery Delivery Max. Capacity
Pressure Pressure for Nitrogen
Regulator Range, Gauge, ft3/hr (L/min)
psig psig "C" Size 1/2" NPT
Model Part No. (bar) (bar) Outlet Outlet
(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)
changed if a more convenient reading 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 oxy­fuel gas process, a suitable shut-off valve and check valve (or hydraulic back-pressure valve for fuel gas if desired) must be installed be­tween station outlet and regulator to prevent possible backflow. For additional information, refer to the latest National Fire Protection Association's Standard, NFPA No. 51.
F-15-396-B
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). Max. Inlet Pressure: 400 psig (27.6 bar). Inlet and Outlet Connections: 1/2-in.—14 NPT fe-
male.
Operating T emp. Range:–40 to160o F; (-40 to 71o 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-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 inter-
OPTIONAL ACCESSORIES Shutoff Valve (V-35, P/N 998210; V-53, P/N 639674;
or V-54, P/N 998184) and CV -5 Check V alve Adaptor (P/N 639717); A vailable to meet the latest requirements
of NFP A No. 51 when using an R-6700 regulator for sta­tion 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
o
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 equip­ment:
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
INST ALLATION Since the regulators are provided with pipe con-
nections for direct attachment to any pipeline, a responsible person must determine that a regula­tor is installed in the correct, properly labeled pipe­line. Also a regulator must not be changed from one gas service to another until a responsible per­son has determined that it is safe to do so.
Be sure this information reaches the operator. Y ou can get extra copies through your supplier.
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 T eflon t ape 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 st a­tion 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.
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. T esting 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 de­livery pressure (see table) in the delivery line.
T o 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 .
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 equip­ment.
7. Open the shut-off valve SLOWL Y 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 ap­propriate. Make sure "IN" connection of the regulator is installed on the gas supply line and the delivery line is connected to the "OUT" connection.
OPERA TION
T o Adjust Pressure:
1. To increase delivery pressure, turn the pressure­adjusting screw clockwise. To decrease delivery pressure, turn the pressure adjusting screw coun­terclockwise.
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.
REP AIR SERVICE
Regulators in need of repair should be returned to your ESAB distributor or to ESAB Remanufacturing Center, 41 1 S. Ebenezer Road, Florence, SC 29501.
MAX. DELIVERY PRESS.
R-6704
MAX. DELIVERY PRESS.
MAX. DELIVERY PRESS.
DELIVERY PRESSURE, PSIG
100 PSIG
50 PSIG
INLET
Capacity Curves - R-6700 Series regulators
R-6703
200 PSIG
INLET
R-6702
INLET
MAX DELIVERY PRESS.
R-6701
NITROGEN FLOW RATE, CU. FT./HR.
300 PSIG
INLET
“C” SIZE OUTLET (0.328 I.D.)
1/2" NPT. SCH. 40 OUTLET (0.622" ID.)
400 PSIG
INLET
F-15-396-B 1/2000 2M Printed in U.S.A.
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