Flowserve TSQVIOM User Manual

MACH 1 TSQV

SEVERE SERVICE PLUG VALVES

FOREWORD

The Flowserve Corporation has established this
Installation, Operating and Maintenance Manual to
facilitate field installation, operation and repair of
Triple Seal Mach 1 Valves

Only Flowserve replacement repair parts and
assembly tooling made or designed by Flowserve
should be used. It is recommended that questions
or concerns involving the processes described in
the manual be directed to the local Sales
Representative of Flowerve Corporation.

TABLE OF CONTENTS

Section Title Page

I. Installation Instructions- Flanged and Welded Valves……………….3
II. Operating Instructions, Parts List & Packing Options………………..4
Ill. Materials, Fastener Torques & Figures………………………………6
IV. Valve Disassembly……………………………………………………..8
V. Valve Assembly 1 "-6"………………………………………………… 9

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SECTION I
INSTALLATION INSTRUCTIONS – FLANGED AND WELDED
TSQV PLUG VALVES

FLANGED:

Installation of Flowserve flanged valves is best accomplished by locating valves in
pipeline flanges, assuring all corrosion and foreign materials are removed from pipe
flange, and then centering the gaskets with the valve flanges. Fasteners or taper
pins should be used to align holes and locate gaskets. Fasteners should be
tightened to the corresponding valve and fastener value.

WELDING:

Flowserve Corporation, Flow Control Division recommends using only qualified
welding procedures and personnel for weld installation of TSQV valves.

The following precautions should be observed:

1. The valve should be inspected prior to welding to assure that no foreign materials
obstruct the flow passageway and that the weld preparation area is free of corrosion
and physical damage.

2. The valve should be in the open position while being welded. Open position is
when the flats on the plug stem are parallel with the pipeline.

3. The TSQV valve contains various sleeve and diaphragm materials that have
different maximum temperature limitations. Refer to Table 1.1 for temperature
limitations.

4. The valve body sleeve and diaphragm area must not exceed these temperatures
during welding. This includes preheats, interpasses or post weld heat treatments, as
applicable. Refer to Figure 2 for locations of the sleeve and diaphragm in the center
valve section

5. Welding of the TSQV Valve without disassembly may be accomplished with no
damage to the sleeve and diaphragm. Precautions MUST be taken to cool the valve
bowl and monitor temperature. The temperature of the center or bowl area of the
valve must not exceed the listed temperature of the material. Valves, sizes two inch
and smaller, must be wrapped with water soaked, fire-resistant material to cool the
valve bowl and inlet where the weld is to be made. Use temperature melt crayons
equal to the sleeve and diaphragm rating to mark the body welding end and monitor
the body temperature. Thermocouples may be attached to the welding end of the
body or surface pyrometers may be used to monitor the body bowl temperature.

CAUTION: DO NOT ALLOW WATER
FROM THE SOAKED WRAPPING
MATERIAL TO ENTER THE
WELDMENT.

Table 1.1 – Temperature Limitations

Material

Description

Temperature

UHMWPE 200°F (93°C)
PFA 500°F (260°C)
FEP and Tefzel 275°F (135°C)

Max.

3

SECTION II
OPERATION INSTRUCTIONS AND PARTS LIST FOR TSQV VALVES

Part reference cited in this section can be identified
using Figures 1-3 (Section III) and the material list.

Periodic maintenance requirements for TSQV
valves may vary due to operating conditions
of the process. Factors such as operating
temperature and pressure, flowstream, solid
content, and valve cycles can greatly
influence valve performance and
maintenance requirements. Seal wear and
degradation is compensated by correctly
adjusting appropriate parts. For TSQV valves,
three possible leak paths occur; for each leak
path there exists a means of adjustment.
Leak paths are BONNET, STEM and LINE
(through). Each leak path and corresponding
adjustment shall be treated separately.

I. BONNET

Leakage due to thermal cycling (gradients) and
frequent high pressure cycling is stopped by
snugging the top cap fasteners (item 10) in a
"criss-cross" manner (1-3-2-4) per Fig. 3. This
adjustment is most effective when the valve is not
pressurized. It is important that the top cap
fasteners not be torqued above the level specified
in Tables 1a or 1b.

TSQV Assembly and Parts List

2. STEM

Leakage due to wear of the service packing is
stopped by tightening the packing adjuster
fasteners (item 8) in 1/2 turn increments. The
fasteners should be tightened evenly. The
packing adjuster fasteners should not be
tightened above the torque level specified in
Table 3 (pg 6). If possible, the valve should be
operated between adjustments to assure that
the plug stem will not be "frozen" due to
overloading the stem packing. If stem leakage
persists, or the packing adjuster fasteners
bottom out, the stem packing should be
replaced.

3. LINE (through)
Through leakage due to wear or damage to the
valve sleeve, or primary seal can be stopped by
tightening the plug adjuster fasteners (item 12)
in 1/4 turn increments. The fasteners should be
tightened evenly. If possible, the valve should be
operated between adjustments to assure that
the plug has not been forced into the sleeve
excessively, producing an unnecessary high
valve operating torque. Should the valve be
leaking excessively after numerous adjustments,
the sleeve will require replacement.

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