Globe Valve - C 09.1 [V 01] CLASS 600


Testing:
Globe valves are pressure tested according to API 598: shell test, backseat test,
closure low pressure test (if specified in an order), closure high pressure test.

Installation:
Globe valves can be installed into pipeline in any position, however position
with vertical stem axis is recommended.

Order specification:
Type number, nominal size, pressure class, connection, actuation type, trim,
tests required, accompanying documentation.

Application:
Globe valves are used as a shut-off valve for
non-aggressive liquids, saturated steam, oil,
air, crude oil and its products.

Characteristics of working conditions :
Pressure-temperature ratings as per
ANSI B 16.34

Technical description:
Design of MSA cast steel globe valves
complies with API 600, BS 18 73.
Stem has outside screw and is either rising,
rotary or rising, non-rotary. Standard stem
screw is ANSI B 1.5, ACME type. Stem and
stuffing box area meet requirements of
API 600. Stem nut is firmly seated in yoke
bonnet head or on antifriction bearings.
Bonnet joint is done by bonnet bolts and nuts.
Globe valves have cast disc, which is moving
perpendicularly to a sealing seat.
Seats are screwed and secured by a sealing
weld around port circumference. Minimum
thickness of seat and disc sealing surfaces
overlay is 1,6 mm, hardness depends on type
of overlay material.
Globe valves are controlled by hammer-blow
handwheel or in combination with bevel gear
box.
Stem sealing is done by braided and die-
formed graphite rings. Qualities of MSA
globe valves packings meet requirements of
1990 Clean Air Act, Amendment.

Face-to-face dimensions:
Main and connecting dimensions of standard
design are evident from the table below.


Materials:
Standard globe valves are supplied of material
ASTM A 216 WCB, TRIM Nr. 8 according to
API 600.
Other material variants : A 352 LCC, A 217
WC6, A 217C5, A 217 C 12 with
corresponding Trim according to API 600.


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