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PRESSURE SEAL GATE VALVES - ESPECIFICACION MATERIALES
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GATE VALVES
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STANDARD MATERIAL SPECIFICATIONS
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SERVICE RECOMMENDATION
- The gate valve is normally
used for on-off service. It is not recommended for
throttling.
- The gate valve is normally
installed to pipe horizontally and the valve stem
stands vertically. It can also be mounted to the vertical
direction with the stem facing to the opposite or
other directions except the vertical, provided that
a special construction is prepared depending on the
valve size, service conditions, or materials. In case
of valve purchase for a special purpose other than
the normal installation, the orientation of valve
should be specified.
- After the gate valve is
closed completely with a sufficient force enough to
shut off, the stem should be backed slightly about
1/8 to 1/4 turn to relieve the load on stem. This
will cause the stem to expand a little without valve
bending or damage, not affecting the valve shutoff.
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MATERIALS
(IN ACCORDANCE WITH ASTM)
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NO
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PART NAME
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CARBON STEEL
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ALLOY STEEL
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STAINLESS STEEL
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TYPE WCB
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TYPE WC6
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TYPE WC9
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TYPE C5
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TYPE C12
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TYPE CF8M
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1
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BODY
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A216-WCB
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A217-WC6
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A217-WC9
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A217-C5
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A217-C12
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A351-CF8M
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2
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BONNET
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A216-WCB
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A217-WC6
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A217-WC9
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A217-C5
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A217-C12
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A351-CF8M
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3
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WEDGE
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WCB + STL
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WCB + STL
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WC9 + STL
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C5 + STL
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C12 + STL
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CF8M + STL
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4
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STEM
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A479-410
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A479-410
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A479-410
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A479-410
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A479-410
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A479-316
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5
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HAND
WHEEL
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A197 or WCB
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A197 or WCB
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A197 or WCB
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A197 or WCB
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A197 or WCB
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A197 or WCB
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6
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BODY
SEATRING
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C/S 1020 + STL
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A182F11 + STL
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A182F22 + STL
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A182F5a +STL
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A182F9 + STL
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A240-316 + STL
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8
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GASKET
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SOFT STEEL
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304 S.S
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304 S.S
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304 S.S
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304 S.S
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316 S.S
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9
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PACKING
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GRAPHITE
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GRAPHITE
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GRAPHITE
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GRAPHITE
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GRAPHITE
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GRAPHITE
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10
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GLAND
FLANGE
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A283-D
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A283-D
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A283-D
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A283-D
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A283-D
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A351-CF8
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11
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GLAND
BOLT
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A307-B
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A307-B
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A307-B
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A307-B
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A307-B
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A193-B8
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12
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GLAND
NUT
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A307-B
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A307-B
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A307-B
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A307-B
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A307-B
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A194-8
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14
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PACKING
GLAND
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C/S 1020 + Cr
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A479-410
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A479-410
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A479-410
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A479-410
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A479-316
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15
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BONNET
BOLT
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A193-B7
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A193-B16
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A193-B16
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A193-B16
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A193-B16
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A193-B8
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16
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BONNET
NUT
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A194-2H
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A194-4
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A194-4
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A194-4
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A194-4
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A194-8
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17
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YOKE
CAP
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C/S 1020
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C/S 1020
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C/S 1020
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C/S 1020
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C/S 1020
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C/S 1020 + Zn
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18
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YOKE
SLEEVE
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A439-D2
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A439-D2
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A439-D2
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A439-D2
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A439-D2
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A439-D2
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19
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HANDLE
NUT
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C/S 1020
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C/S 1020
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C/S 1020
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C/S 1020
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C/S 1020
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C/S 1020 + Zn
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20
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SET
SCREW
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C/S 1020
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C/S 1020
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C/S 1020
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C/S 1020
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C/S 1020
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C/S 1020
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21
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GREASE
NIPPLE
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STEEL
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STEEL
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STEEL
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STEEL
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STEEL
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STEEL
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22
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BEARING
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STEEL
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STEEL
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STEEL
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STEEL
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STEEL
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STEEL
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23
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YOKE
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A216-WCB
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A216-WCB
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A216-WCB
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A216-WCB
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A216-WCB
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A351-CF8
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24
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YOKE
BOLT
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A193-B7
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A193-B7
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A193-B7
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A193-B7
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A193-B7
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A193-B8
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25
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YOKE
NUT
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A194-2H
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A194-2H
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A194-2H
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A194-2H
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A194-2H
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A194-8
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27
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BONNET
CLAMP
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C/S 1045
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C/S 1045
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C/S 1045
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C/S 1045
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C/S 1045
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A204-304
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28
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RETAINER
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C/S 1045 + Cr
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A240-304
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A240-304
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A240-304
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A240-304
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A240-316
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29
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ADAPTER
RING
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C/S 1045 + Cr
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A240-304
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A240-304
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A240-304
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A240-304
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A240-316
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31
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BONNET
CLAMP
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C/S 1045
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C/S 1045
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C/S 1045
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C/S 1045
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C/S 1045
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A204-304
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32
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WASHER
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A479-410
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A479-410
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A479-410
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A479-410
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A479-410
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A204-304
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33
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HINGE
CLAMP
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A216-WCB
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A216-WCB
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A216-WCB
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A216-WCB
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A216-WCB
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A351-CF8
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34
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GLAND
BOLT
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A307-B
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A307-B
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A307-B
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A307-B
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A307-B
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A193-B8
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35
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GLAND
CLAMP
BOLT
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A307-B
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A307-B
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A307-B
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A307-B
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A307-B
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A193-B8
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36
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GLAND
CLAMP
NUT
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A307-B
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A307-B
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A307-B
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A307-B
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A307-B
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A194-8
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