WCB SS304 316 Stainless Steel Gate Valve Flange Type Handwheel
Stainless Steel Cast Valve
Pressure seal CG gate valve
Main features: CG Gate valve Body-bonnet joint is self tightening
pressure seal type with reliable sealing function even though the
temperature and pressure is fluctuated. Pressure seal bonnet type
is preferentially used for high pressure and high Degree valves.
Design standard:API 600 ASME B16.34
1. Gate valve Pressure range:CLASS 900Lb~2500Lb
2. Gate valve Nominal diameter:2~30″
3. Gate valve Body material:Carbon steel, Stainless steel, duplex
stainless steel, Alloy steel, Nickel alloy
4. End connection:RF RTJ BW
5. Mode of operation:Hand wheel, Gear box, Electric, Pneumatic,
hydraulic device, Pneumatic-hydraulic device；
Product features:
1.Small flow resistance for fluid, only a small force is required
when opening/closing;
2.No limitation on the flowing direction of medium；
3.When valve is full opened, the sealing surface suffered small
friction from the working medium；
4. Stem extended design can be chosen
5. Pressure seal bonnet
6. Solid wedge can be chosen;
7. Spring loaded packing can be chosen;
8. Low emission packing can be chosen according to ISO 15848
requirement;
9. With By-pass design be chosen；
Technical Requirement:
1. Design and Manufacture: DIN 3352;
2. Face to Face: DIN 3202 F4/F5;
3. Flange End: DIN 2532 PN10/16;
Main parts and materials
| Parts Name | Materials |
| Body,Bonnet | GGG50 |
| Disc | GGG50+NBR/EPDM |
| Stem | 2CR13 |
| Seat Ring | GGG50 |
What is Gate Valve?
A gate valve can be defined as a type of valve that used a gate or
wedge type disk and the disk moves perpendicular to flow to start
or stop the fluid flow in piping.
A gate valve is the most common type of valve used in any process
plant. It is a linear motion valve used to start or stop fluid
flow. In service, these valves are either in a fully open or fully
closed position.
When the gate valve is fully open, the disk of a gate valve is
completely removed from the flow. Therefore virtually no resistance
to flow. Due to this very little pressure drops when fluid passes
through a gate valve.
To achieve proper sealing, when the valve is fully closed, 360°
surface contact is required between disk and seats.
Gate valves should not be used for regulation or throttling of flow
because accurate control is not possible.
The high velocity of the flow in the partially open valve may cause
erosion of the disc and seating surfaces and also creates vibration
and noise.
| Valve Type | CS / SS GATE VALVE - FL / BW |
| Design Std | BS EN ISO 10434 [BS 1414] / API 600 / API 602 / API 603/ASME B16.34 |
| Size Range | 40 DN to 400 DN [1 1/2” to 16”] |
| Body | [CS - ASTM A 216 Gr. WCB] [SS - ASTM A 351 Gr.CF8 / CF8M] |
| Trim | AISI 410 / 304 / 316 |
| Seat / Wedge | 13% Cr. Steel / AISI 410 / 304 / 316 |
| Design Features | Bolted Bonnet, OS & YT, HW & Gear operated |
| Prorating | ASME - Class 150 / 300 / 600 |
| Face to Face | ASME B 16.10 / EN 558 -1 / API 6D |
| End Connection | Flanged | ASME B16.5, CLASS 150 / 300 / 600 |
| Butt weld | ASME B16.25 |
| Testing Std. | BS EN 12266 - 1 [BS 6755-1] / API 598 |
| Optional | Lantern Ring / indicator & Locking Device/ Renewable Seat /
Stellite Hard facing / Jacketed Provision / RTJ Flanges / By Pass
Arrangement / Higher Sizes / Special MOC: Austenitic and Duplex
Stainless Steels |
| PN | DN | Size(mm) |
| L | D | D1 | D2 | B | N-φ | H |
| 1.6MPa | 25 | 160 | 115 | 85 | 65 | 14 | 4-14 | 275 |
| 32 | 180 | 135 | 100 | 78 | 16 | 4-18 | 280 |
| 40 | 200 | 145 | 110 | 85 | 16 | 4-18 | 330 |
| 50 | 230 | 160 | 125 | 100 | 16 | 4-18 | 350 |
| 65 | 290 | 180 | 145 | 120 | 18 | 4-18 | 370 |
| 80 | 310 | 195 | 160 | 135 | 20 | 8-18 | 400 |
| 100 | 350 | 215 | 180 | 155 | 20 | 8-18 | 415 |
| 125 | 400 | 245 | 210 | 185 | 22 | 8-18 | 460 |
| 150 | 480 | 280 | 240 | 210 | 24 | 8-23 | 510 |
| 200 | 550 | 335 | 295 | 265 | 26 | 12-23 | 710 |
| 250 | 650 | 405 | 355 | 320 | 30 | 12-25 | 786 |
| 300 | 750 | 460 | 410 | 375 | 30 | 12-25 | 925 |
Types of Gate Valves
There are three ways to classify the gate valve.
Types of Disk
Solid taper wedge
Flexible wedge
Split wedge or Parallel disks Valve
Types of Body Bonnet Joint
Screwed Bonnet
Bolted-Bonnet
Welded-Bonnet
Pressure-Seal Bonnet
Types of Stem movement
Rising Stem or OS & Y Type (Outside Stem and Screw Type)
Non-rising Stem type
Features:
● Flat-bottomed seat traditional gate valves are usually deposited
in the bottom groove of the valve due to external objects
such as stone, wood, cement, paper, debris, etc., after flushing
the pipe with water. Cause cannot close tightly and form slack
phenomenon, soft-sealing gate valve using the same as the pipe at
the bottom of the flat design, not easy to cause debris deposition,
the fluid flow unimpeded, the whole package glue valve plate is
made of high quality rubber, within the whole outsourcing, domestic
first-class rubber vulcanization technology make the valve plate
after vulcanization can ensure accurate geometry size, and rubber
and nodular cast iron gate connecting firm, not easy to fall off
and elastic memory preferred.
● The corrosion resistant valve body is painted with powder and
epoxy resin to prevent corrosion and rust of the valve body, and
can
be used in sewage system.
● Not easily broken into traditional cast iron.
