Flowserve 1878 User Manual

Manual No. 1878-YGB-BL-1

Issued: November 26, 2002

Revision B

INSTRUCTION MANUAL

for

½" thru 2" 1878 lb. Y-Pattern Globe Valves

with T-Handle and Bellows Seal

Flowserve Corporation

Flow Control Division

1900 S. Saunders Street

P.O. Box 1961

Raleigh, NC 27603

Phone: [phone]

FAX: [phone]

TABLE OF CONTENTS

1.0 Physical Description and Operation of Equipment

2.0 Design Conditions

3.0 Operating Conditions

4.0 Test Conditions

5.0 Operating Precautions and Limitations

6.0 Installation Instructions

7.0 Maintenance Requirements

8.0 Periodic Inservice Testing Recommendations
and Procedures

9.0 Maintenance Instructions

10.0 Storage Requirements

11.0 Reference Drawings

12.0 Customer Assembly Drawing(s)

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Manual No. 1878-YGB-BL-1

REVISION RECORD

Revision Section Description Date

- All Original Issue 11/26/2002
A 9.1.2 Added Gland nut torque 04/07/2005

Values

B 11.0 Updated Figure 1 02/01/2008
B 7.2, 9.2, 9.4 Replaced all references to part 02/01/2008

“110A” with “110”

B 9.1 Replaced all references to part 02/01/2008
“024L” with “025”

B 9.1.1, 9.4 Replaced all references to part 02/01/2008
“024U” with “024”

B 9.3.1 Removed 1st paragraph with 02/01/2008

reference to lapping tool dwg.
B 9.4-C Expanded troubleshooting 02/01/2008

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1.0 PHYSICAL DESCRIPTION AND OPERATION OF EQUIPMENT

1.1 GLOBE VALVES (Figure 1)
These valves are primarily designed for tight shutoff and throttling service

where control of the velocity of th e fluid is necessary. If required, they can
also serve as a means of isolating a portion of a system. Their use however,
is limited to those systems where head losses are not critical as the internal
flow passage creates a pressure drop across the valve. With the disc in the
full open or any intermediate position, the fluid is allowed to flow through
seat area at a rate determined by the position of the disc. With the disc in
the closed position, the force of the stem provides a mechanical seal
between the disc and seat and effects a shutoff at the valve.

The ½”-2” Y-Globe valves have a precision cast body. It is an investment

casting and offers smooth flow passages for minimum pressure drop and
minimum turbulence. A bellows is provided as a primary sealing device.

The ½”-2” Y-Globe valves can be provided with a variety of disc styles to

provide different throttling flow characteristics. The following three distinct
disc styles are available: quick plug type, parabolic, cage type. A circular
plate below the tee handle/handwheel nut indicates the type of disc .

All ½”-2” Y-Globe valves are supplied with a tee-handle actuator and a

bellows seal. To operate these valves, turn the tee-handle in a clockwise
direction for closure and counterclockwise for opening.

2.0 DESIGN CONDITIONS
Refer to the applicable drawings in Section 12.0 of this manual.

3.0

OPERATING CONDITIONS

Refer to the applicable drawings in Section 12.0 of this manual.

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4.0 TEST CONDITIONS

4.1 Each valve covered by this manual has received the following hydrostatic
tests:

4.1.1 Shell hydrostatic test at 1.5 times the 100°F pressure rating.

4.1.2 A disc closure test at 110% of the 100°F pressure rating.

4.1.3 A seat leakage test at 110% of the valves specified maxim um "delta

P".

4.1.4 A backseat leakage test at 110% of the 100°F pressure rating.

4.1.5 A packing test at 110% of the 100°F pressure rating.

5.0 OPERATING PRECAUTIONS AND LIMITATIONS

5.1 Maximum hydrostatic test pressure shall not exceed the va lues imposed by
the ASME Code.

6.0 INSTALLATION INSTRUCTIONS

6.1 LIFTING AND HANDLING REQUIREMENTS AND LIMITATIONS

6.1.1 Good judgment should be exercised in selecting a lifting device that

will safely support the unit's weight.

6.2

INSTALLATION

6.2.1 Although the valves have been shipped in a clean condition, prior to

installing the valves, examine the lines and the valve ports for foreign
matter and clean them thoroughly if they have been exposed to the
elements. (BEFORE CLEANING IN THIS FASHION, CHECK AT
THE SITE TO SEE IF A SPECIFIC CLEANING PROCEDURE
SHOULD BE FOLLOWED.) Open the valves fully and flush them out
with water if possible; otherwise blow them out with air or steam.

In performing this cleaning procedure, the ports should be vertical,

the stem horizontal to assure complete removal of all matter which
might have accumulated during storage.

6.2.2 Ensure that there is no line sag at the point of installation. Eliminate

any pipeline deviation by the proper use of pipeline hangers or similar
device.

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6.0 INSTALLATION INSTRUCTIONS (Continued)

6.2.3 Where possible, install the valves with the stem vertical.

6.2.4 The valves should then be blocked or slung into position with

apparatus that is sufficient to hold the valve assembly weight while
the valve is being welded into the line. WELDING SHOULD TAKE
PLACE WITH THE DISC IN THE OPEN POSITIO N. Care should be
taken during welding to ensure that foreign material or dirt does not
enter the valve and cause interference with subsequent operation.

6.2.5 Valves are normally shipped pre-packed; if specified otherwise, the

packing is shipped loose with the valve, and should be installed at
this time.

With the valve fully backseated, install the packing, carefully placing

the joint of each ring approximately 180° from the preceding piece. It
will probably be necessary to slightly flatten each packing ring prior to
installation to allow easy insertion within the stuffing box. The flange
gland can be used to seat the packing in position, one ri ng at a time.
Upon completely filling the stuffing box, replace the gland stud nuts
(234) and very carefully draw the packing down. (Refer to Section

9.1.2 for bolt torque values). Stroke the valve several times and then
retighten the nuts.

Special attention should be observed to assure the flange is drawn

evenly and that the bore of the flange is concentric with the valve
stem. If the flange is drawn unevenly, scoring of the stem may result.

6.3 PRE-OPERATIONAL CHECKS

6.3.1 After installation the operation of manual valves should be verified by

closing the valve. The valve should seat tightly with less than 40 lbs.
of push/pull force on the handwheel. If the valve does not close
tightly

DO NOT apply extra leverage; instead refer to Para. 9.4 A and

B.

6.4

OPERATION

6. 4.1 After the valves are heated and run in, it may be necessary to draw

the packing to eliminate leakage. In adjusting the packing, the flange
gland should be drawn in as evenly as possible. This can be
accomplished by alternately tightening the gland stud nuts one-half
turn until the packing is tight.

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