Gate Valve : Bolted Bonnet Type
For Cast Carbon Steel | For Stainless Steel | Product Range | Special Specification


The upper potion of the Yoke Sleeve is hexagonally tapered to fix the handwheel. The standard material is Nodular Ni-resist D2 with over 1150 degree dissolution point in accordance with API Std. spec.
The Body-bonnet bolts are manufactured in accordance with API Std. 600 spec. The nuts also strictly confirm with ANSI B1.1 The stud-bolt nuts, hexagonal, rigid and got-forged, bear material notation as well as do the bolt nuts made according to ANSI B18.2.2
The bonnet and valve body have the same wall thickness. The body- bonnet flange drilling is spot-faced  to exactly meet stud-bolt nuts. The bonnet back seat bushing guarantees packing replacement even when the valve is fully opened. The stem packing dimensions of the stuffing box are in accordance with API specifications.
The machined forged stem comes with a T-shape head, which connects the slot of the wedge. The Spherically shaped contacting surface of the head gives greater strength and durability. The stem dimensions are in accordance with API Std. 600 Specifications. The heat treated stem delivers adequate mechanical properties as well as excellent surface hardness. Further, opening/shutting friction is minimized by accurate machining and lapping.
Bottom seated type seat rings are welded or screwed into the body. They are forgings that have been heat treated to delived the best mechanical properties and required hardness. The difference in hardness between seats and wedge is in accordance with API specifications.
The standard disc of our valves is a one-piece flexible wedge. Slots are machined on both sides of the wedge to allow it to travel correctly in the integrally cast body guides. The  wedge seating surfaces have been accurately machined, grind and lapped to a mirror finish to prevent leakage and eliminate galling. 
The cast steel body is designed to insure a wall thickness which is greater at any point than the minimum specified by API Std. 600. Special care has been taken with the design of the Class 150 valve body so that the elliptically shaped center section is free from intensified stresses in the critical area. The body of above Class 300 are made circular in shape as much as possible to minimize distortion even under extreme operating conditions. Inlet and outlet port dimensions conform with ANSI B16.5 Pipe Fitting. The welded-in type seat ring is standard to insure interchangeabillity. Except for class 150, the standard body-bonnet joint is male and female. 

For Cast Carbon Steel   [top]

NO NAME OF PART ASTM SPECIFICATION
STANDARD HIGH TEMPERATURE SERVICE LOW TEMPERATURE SERVICE
1 BODY A216-WCB A217-WC6 A217-WC9 A217-C5 A217-C12 A352-LCB
2 BONNET A216-WCB A217-WC6 A217-WC9 A217-C5 A217-C12 A352-LCB
3 DISC A217-CA15 A217-WC6 A217-WC9 A217-C5 A217-C12 A352-LCB
4 BODY SEAT RING A105+HARD FACE A105+HARD FACE A105+HARD FACE A105+HARD FACE A105+HARD FACE A182-F304
5 STEM A182 F6a A182 F6a A182 F6a A182 F6a A182 F6a A276-304
7 BONNET BUSH A276-410 A276-410 A276-410 A276-410 A276-410 A276-304
8 PACKING GLAND A276-410 A276-410 A276-410 A276-410 A276-410 A276-304
9 GLAND FLANGE A105 A105 A105 A105 A105 A105
10 YOKE SLEEVE A439-D2C A439-D2C A439-D2C A439-D2C A439-D2C A439-D2C
11 BONNET BOLT A193-B7 A193-B7 A193-B7 A193-B7 A193-B7 A320-L7
12 BONNET NUT A194-2H A194-2H A194-2H A194-2H A194-2H A194-4
13 GLAND BOLT A193-B7 A193-B7 A193-B7 A193-B7 A193-B7 A320-L7
14 GLAND NUT A194-2H A194-2H A194-2H A194-2H A194-2H A194-4
15 HANDLE NUT STEEL STEEL STEEL STEEL STEEL STEEL
16 SET SCREW STEEL STEEL STEEL STEEL STEEL STEEL
17 SLEEVE GLAND STEEL STEEL STEEL STEEL STEEL STEEL
19 HANDWHEEL A395 A395 A395 A395 A395 A395
20 HINGE PIN A276-410 A276-410 A276-410 A276-410 A276-410 A276-304
21 PACKING COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
22 GASKET COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
23 GREASE NIPPLE STEEL STEEL STEEL STEEL STEEL STEEL
24 LANTERN A276-410 A276-410 A276-410 A276-410 A276-410 A276-304
26 YOKE A216-WCB A216-WC6 A216-WC9 A216-C5 A216-C12 A352-LCB
27 YOKE BOLT A193-B7 A193-B7 A193-B7 A193-B7 A193-B7 A320-L7
28 YOKE NUT A194-2H A194-2H A194-2H A194-2H A194-2H A194-4
29 BEARING COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL

For Stainless Steel   [top]


BILL OF MATERIAL
NO PARTS NAME ASTM SPECIFICATIONS
1 BODY A351-CF8 A351-CF8M A351-CF3 A351-CF3M
2

BONNET

 A351-CF8 A351-CF8M A351-CF3 A351-CF3M
3

WEDGE

 A351-CF8 A351-CF8M A351-CF3 A351-CF3M
4

STEM

 A276-304 A276-316 A276-304L A276-316L
5

YOKE SLEEVE

 A439-D2C A439-D2C A439-D2C A439-D2C
6

YOKE CAP

 A307-B+ZN PLATED A307-B+ZN PLATED A307-B+ZN PLATED A307-B+ZN PLATED
7

PACKING GLAND

 A276-304 A276-316 A276-304L A276-316L
8

GLAND FLANGE

 A351-CF8 A240-304 A351-CF8 A240-304 A351-CF8 A240-304 A351-CF8 A240-304
9

BONNET BOLT

 A193-B8 A193-B8 A193-B8 A193-B8
10

BONNET NUT

 A194-8 A194-8 A194-8 A194-8
11

GLAND BOLT

 A193-B8 A193-B8 A193-B8 A193-B8
12

GLAND NUT

 A194-8 A194-8 A194-8 A194-8
13

HINGE PIN

 A276-304 A276-304 A276-304 A276-304
14

HAND WHEEL

 A536 A536 A536 A536
15

HAND WHEEL NUT

 A307-B+ZN PLATED A307-B+ZN PLATED A307-B+ZN PLATED A307-B+ZN PLATED
16

PACKING

 COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
17

GASKET

 COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
18

YOKE

 A351-CF8 A351-CF8/CF8M A351-CF8/CF3 A351-CF8/CF3M
19

YOKE BOLT

 A193-B8 A193-B8 A193-B8 A193-B8
20

YOKE NUT

 A194-8 A194-8 A194-8 A194-8
21

SET SCREW

 A307-B A307-B A307-B A307-B
22

GREASE NIPPLE

 B16 B16 B16 B16
23

NAME PLATE

 AL./A240-304 AL./A240-304 AL./A240-304 AL./A240-304

Product Range   [top]
MATERIAL A216 WCB
A217 WC6, WC9, C5, C12
A352 LCB, LC1, LC2, LC3
A351 CF8, CF8M, CF3, CF3M
etc.
CLASS

150#, 300#, 600#, 900#, 1500#, 2500#
SIZE 2'~ 48'

Optional Specification   [top]
Eletric Actuator Operated Chain Wheel Operated Gear Operated By-pass Valve Limit Switch
Long Bonnet Type
Long Stem Type
Drains
ETC.