MODCO FIGURE 500 User manual

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: [phone] / FAX: [phone]
MODCO CLOSURES
Operation, Maintenance & Welding Instructions
MODCO FIGURE 500 HINGED CLOSURES

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: [phone] / FAX: [phone]
MODCO FIGURE 500 HORIZONTAL CLOSURES
OPERATION AND MAINTENANCE INSTRUCTIONS
PROPER HINGE ADJUSTMENT ON THE MODCO FIG. 500 CLOSURE IS NECESSARY TO INSURE THE
CLOSURE HINGE PROVIDES PROPER ALIGNMENT OF CAP AND SUB, AND AFFORDS BALANCE OF
CAP TO ELIMINATE THREAD DRAG DURING MAKE-UP AND ALLOW PORPER METAL TO METAL
CONTACT OF CAP SEALING FACE AND O-RING GROOVE LANDS.
VERY IMPORTANT: TO PREVENT SUB WARPAGE, THE WELDING INSTRUCTIONS
ATTACHED TO EACH CLOSURE SHOULD BE FOLLOWED BY THOSE
FABRICATING THE CLOSURE.
A. PRIOR SERVICE HINGE ADJUSTMENTS:
IF ANY DIFFICULTY IS ENCOUNTERED DURING MAKE-UP OF CAP ONTO SUB OR IF EXCESSIVE
THREAD DRAG IS NOTICED, THE FOLLOWING ADJUSTMENTS SHOULD BE MADE:
1. TO CHECK “PARALLEL” ALIGNMENT OF CAP TO SUB – UNSCREW CAP FROM
SUB AND PULL CAP BACK A FEW INCHES TO CHECK FOR “PARALLEL”
ALIGNMENT OF CAP TO SUB. TO ADJUST THE “PARALLEL” ALIGNMENT,
LOOSEN THE SET COLLARS LOCATED ON THE CAP CENTER PIN EITHER SIDE OF
HINGE ARM. IF CAP TILTS INWARD AT TOP OF SUB, MOVE THE HINGE ARM
ALONG THE CAP CENTER PIN TOWARD THE CAP. IF CAP TILTS OUTWARD AT
TOP OF SUB, MOVE THE HINGE ARM AWAY FROM THE CAP. AFTER PROPER
ADJUSTMENT IS MADE, TIGHTEN THE ALLEN SET SCREWS WHICH HOLD SET
COLLARS IN PLACE.
WARNING: ALWAYS TIGHTEN OUTBOARD SET COLLAR TIGHT, TO ELIMINATE CAP FROM
SLIDING OFF OF THE CAP CENTER PIN AND DROPPING FREE. INJURY COULD
RESULT.
2. “VERTICAL” ADJUSTMENT OF THE CAP – IS MADE BY TIGHTENING OR
LOOSENING THE ADJUSTING NUT ON THE VERTICAL ADJUSTING PIN. PROPER
ADJUSTMENT WILL PROVIDE BALANCE OF CAP ON THE HINE, AND ALL
WEIGHT OF THE CAP WILL TRANSFER TO THE HINGE AND THEREBY
ELIMINATE WEIGHT OF CAP ONTO SUB THREADS DURING MAKE-UP OF CAP
ONTO SUB.

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: [phone] / FAX: [phone]
B. MARKING CAP AND SUB FOR METAL TO METAL CLOSED POSITION:
AFTER FABRICATION OF CLOSURE, THE FOLLOWING PROCEDURE SHOULD BE USED TO
ESTABLISH METAL TO METAL FULL CLOSED POSITION OF CAP AND SUB:
1. PROCEDURE TO FOLLOW – REMOVE O-RING FROM SUB AND USING
ACTUATOR DEVICE MAKE-UP CAP ONTO SUB UNTIL METAL TO METAL
SEATING OF CAP AND SUB IS OBTAINED. THIS CAN BE DETERMINED WHEN
THERE IS NO MOVEMENT OF CAP ONTO SUB. THIS CAN BE CHECKED, EITHER
BY VISUALLY CHECKING MOVEMENT OF CAP OR BY PLACING FINGERS
ACROSS CAP AND SUB TO FEEL CAP MOVEMENT. MARK “ARROWS” ON BACK
OF CAP AND SUB TO INDICATE-POINT AT WHICH THREADS ARE FULLY
ENGAGED AND THERE IS METAL TO METAL CONTACT BETWEEN CAP AND
SUB. THESE REFERENCE “ARROWS” CAN BE USED ON ALL FUTURE OPENINGS
AND MAKE-UP CLOSURE.
C. OPERATION:
1. CLOSING – TIGHTEN CAP ONTO SUB USING ACTUATOR DEVICE.
IMPORTANT: DO NOT ATTEMPT TO TIGHTEN CAP UNDER PRESSURE.
AFTER CLOSURE IS COMPLETELY MADE-UP SCREW PRESSURE
WARNING DEVICE STEM INTO BODY ON SUB AND TIGHTEN.
2. OPENING – UNSCREW PRESSURE WARNING DEVICE STEM FROM BODY ON
SUB AND SCREW INTO RETAINER ON CAP.
WARNING: DO NOT UNSCREW PRESSURE WARNING DEVICE BODY FROM SUB
WHILE PRESSURIZED. INJURY MAY RESULT. USING ACTUATOR
DEVICE, LOOSEN CAP AND UNSCREW FROM SUB, PULL BACK ON
TROLLEY AND SWING TO SIDE OF SUB.

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: [phone] / FAX: [phone]
D. PREVENTATIVE MAINTENANCE:
TO INSURE TROUBLE FREE OPERATION OF THE CLOSURE, THE FOLLOWING PROCEDURES
SHOULD BE PERFORMED:
1. AT EVERY CLOSURE OPENING:
(a) ALWAYS CLEAN CAP AND SUB THREADS, AND LUBRICATE THOURGHLY.
(b) ALWAYS CLEAN O-RING, O-RING GROOVE, SUB FACE, CAP SEALING FACE, AND
LUBRICATE THOURGHLY.
2. AT REGULAR INTERVALS:
(a) LUBRICATE THROUGH GREASE ZERKS ON CAP CENTER PIN BUSHING, JIB
COLUMN HOUSING, AND TROLLEY WHEELS.
(b) LUBRICATE ACTUATOR DEVICE THREADS.
E. O-RING INFORMATION:
THE “MODCO” O-RING IS SPECIALLY DESIGNED FOR “MODCO” CLOSURES. THE O-RINGS
ARE DIE-MOLDED (FROM A CONTINUOUS MOLD) TO AN EXACT CROSS SECTION DIMENSION
TO FIT THE O-RING GROOVE. STANDARD MATERIAL IS BUNA N 70 DURO – HOWEVER
OTHER COMPOUNDS ARE AVAILABLE. CONSULT FACTORY.

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: [phone] / FAX: [phone]
MODCO FIGURE 500 HINGED CLOSURES
WELDING INSTRUCTIONS
1. THE CLOSURE SUB SHOULD BE THE LAST ITEM WELDED TO THE VESSEL OR BARREL.
VERY IMPORTANT: WEDGING OF CLOSURE SUB TO BARREL OR SHELL COULD
CAUSE CLOSURE SUB WARPAGE OR OUT- OF- ROUNDNES,
WHICH COULD PREVENT CLOSURE FROM SEALING.
2. UNSCREW CAP AND REMOVE 0-RING FROM THE SUB.
3. ON HORIZONTAL HINGED CLOSURES (16” THRU 48” SIZES) POSITION THE JIB COLUMN
HOUSING AT 12 O`CLOCK CENTER ON TOP OF SUB AND BE SURE THAT SUB FACE IS
PERFECTLY VERTICAL.
4. TACK WELD SUB EVERY 4 TO 6 INCHES AROUND CIRCUMFERANCE AND RE-CHECK
VERTICAL POSITION OF SUB FACE.
5. CAP MY BE SCREWED ONTO SUB TO PROTECT SUB THREADS FROM WELDING SPLATTER
AND FOREIGN PARTICLES. (OPTIONAL)
6. AS A PRECAUTION AGAINST SUB DISTORION DURING WELDING, IT IS SUGGESTED THAT
THE SUB BE BRACED FROM 12 O’CLOCK TO 6 O’CLOCK AND 3 O’CLOCK TO 9 O’CLOCK.
THIS ESPECIALLY IMPORTANT ON THIN WALLS SUBS.
7. THE FOLLOWING PROCEDURE IS RECOMMENDED BY LINCOLN ELECTRIC COMPANY AND
THEIR BULLETIN “PIPELINE WELDING”:

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: [phone] / FAX: [phone]
WELD STRINGER BEADS AND HOT PASS WITH TWO MEN ON OPPOSITE SIDES TO EQUALIZE
WELDING STRESSES. FOLLOW THE SEQUENCE SHOWN IN DIAGRAM. MAKE CERTAIN THAT
THE WELDING FROM 7:30 BACK TO 4:30 PROCEEDS WITHOUT INTERRUPTION OR ANY TIE-
IN AT 6:00
VERY IMPORTANT: CAREFUL ATTENTION TO WELDING HEAT AND PROCEDURE
IS RECOMMENDED TO AVOID DISTORTION OF SUB FACE
AND THREADS.
8. TO INSURE THAT NO WARPAGE HAS OCCURRED DURING WELDING, THE FOLLOWING
PROCEDURE MAY BE USED TO BLUE CHECK THE SEALING SURFACES:
1. APPLY EVEN LAYER OF NON-DRYING PRUSSIAN BLUE TO THE CAP SEALING SURFACE.
2. SCREW CAP ONTO SUB TIGHT BY USING ACTUATOR DEVICE.
3. REMOVE CAP AND CHECK FOR CONTINUOUS TRACE OF BLUEING ON O-RING LANDS
OF SUB FACE.
9. LUBRICATE O-RING AND REPLACE IN GROOVE IN SUB FACE.
10. IMPORTANT: FOR VESSELS OR BARRELS THAT REQUIRE POST HEAT TREATMENT AND
STRESS RELEIVING, IT IS IMPORTANT THAT THE BEARINGS IN THE JIB
COLUMN HOUSING AND HINGE ARE BE REMOVED AS WELL AS THE
TROLLEY ASSEMBLY AND PRESSURE WARNING DEVICE.
11. REFER TO THE MODCO FIGURE 500 CLOSURES OPERATION AND MAINTENANCE
INSTRUCTIONS FOR HINGE ADJUSTMENTS AND LUBRICATION PROCEDURES AFTER
FABRICATION OF CLOSURE IS COMPLETED.