Flowserve McCANNA McCannaflo Ball Valve Manuel d'utilisateur télécharger pdf

McCANNA/MARPAC Valves

1. Installation

These valves may be installed in any position, and flow may be from

either direction. Special valves are marked to indicate special service

or flow direction. If valve has been furnished with means for body

cavity pressure relief, Installation Bulletin V-572 should be carefully

read before installation.

The hex end pieces (adaptors (15) are bottomed out in a very tight

metal to metal fit in factory assembly. This should prevent the

inadvertent loosening of the adaptors (15) when any normal piping

force is used in either direction. If it is necessary to back off piping to

line up equipment in new systems, it is still important to grip the

adaptor (15) next to the pipe being adjusted with a strap or parallel

jaw wrench. Do not use wr

enches on the round body portion.

2. Stem Seal Adjustment

If leakage is evident in stem packing area, tighten the adjusting nut

1/4 turn. If leak still persists, repeat above. Replacement of stem seals

(10) is indicated if the leak is still apparent after 1/2 turn.

3. Disassembly

for Seal Replacement

–––––– W ARNING ———

A. Begin with the valve partially open in a depressurized line.

B. Hold the valve by the hexagonal adaptor (15) nearest to the pipe to be

disengaged. Unscrew the pipe from the adaptor (15).

IM V-576B

McCannaflo

Ball Valve

1/4"– 2" Threaded Ends

Installation, Operating and Maintenance Instructions

No. Description

1 Handle

2 Stem

3 Stop Pins (2)

4 Handle Retainer Nut

5Travel Stop

6 Gland Ring

7 Belleville Washer

8 Ball

9Seats (2)

10 Stem Seal Set

11 Body

12 Adaptor Gaskets (2)

13 Grounding Washer

14 Adjusting Nut

15 Adaptors (2)

FIGURE 1

A study of the sectioned drawings will reveal the simple construction of

McCannaflo threaded end ball valves. This line of valves has the “free

floating” ball principle. The ball is not fixed but is free to move with the

line pressure. As a result of this feature, these valves are capable of

tight shut-off with flow in either direction or dead-ended, regardless of

the position of the valve in the line. The downstream seat, which is

opposite the pressurized side of a closed valve must carry the load

exerted by the line pressure on the ball, while the upstream seat is

subject to little load or wear. For this reason it is sometimes possible to

increase useful seat life by turning the valve end-for-end in the pipe line.

1 2

McCANNA/MARPAC Valves 1
4. Reassembly 2

Résumé du contenu

Page 1 - McCANNA/MARPAC Valves

McCANNA/MARPAC Valves1. InstallationThese valves may be installed in any position, and flow may be fromeither direction. Special valves are marked to

Page 2 - 4. Reassembly

C. Unscrew the valve by using a wrench on the adaptor (15) that isstill in the pipe line.D. Hold valve in a vise by one adaptor (15) and unscrew the o

Modèles reliés MARPAC McCannaflo Ball Valve

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Flowserve McCANNA McCannaflo Ball Valve Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Matériel Flowserve McCANNA McCannaflo Ball Valve. Flowserve McCANNA McCannaflo Ball Valve User Manual Manuel d'utilisatio

Résumé du contenu

Modèles reliés MARPAC McCannaflo Ball Valve

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