Design | Construction | Class | |
Materials for the manufacture of Gate Valves | |||
API 600 | Cast | Bolted bonnet | 150# |
Pressure seal bonnet | 900# | ||
API API 602 / BS5352 | Forged | Bolted bonnet | 150# |
Welded bonnet | 800# | ||
API 6A | Forged | Bolted bonnet | 2000 |
Paso directo | API 6D | Bolted bonnet | 150# |
(Gate Valve For Piping (API 600, 602, 603
supplying and distributing of Valves, Pipes, Fittings, Hydraulic Clamps, Hydro-line products and oil, Gas, Petrochemical field supplies
Gate Valves Features
Standard features:
OS&Y / Backseat
Materials:
Notash are supplied with all material types to fulfill all the different combinations of service fluid, design pressure and temperature. Valves can be supplied either forged or casted based on customer specifications. Following materials are under the scope of supply of Notash:
- Carbon Steel valves
- Low temperature carbon steel
- High temperature alloy steel
- Stainless Steel Valves
- Super Austenitic Stainless Steel
- Duplex Stainless Steel
- Super Duplex Stainless Steel
- Ni Alloy
- Titanium
- Aluminum bronze
notash can supplied any of the materials mentioned above to fulfill any additional requirement included in customer specifications
Optional features:
- Lantern ring
- Equalizer
- Locking device
- Stem extension
- Leak-Off & Packing Expulsor
- Low emission packing
- Non rising stem
- Bellows seal gate
Operation:
- Manual / MOV / AOV / HOV / Electrohydraulic
Types:
Wedge Gate/ through conduit / Double expanding
Construction:
Bolted bonnet / Pressure seal
Disc type:
Solid / Flexible/ Split /Parallel slide
Wedge Gate Valves
Split Wedge Design
The wedge is made in two separate parts providing high ability to seal. This is recommended when high thermal or mechanical deformations are expected due to working conditions.
Flexible Wedge Design
The wedge has a machined groove in its central part providing flexibility at the disc.
Solid Wedge Design:
The wedge is made in one solid piece being the downstream side the one which seals the valve when upstream pressure push the wedge againts te downstream seat.
Parallel Gate Valves
Double Expanding Gate
Metal to Metal seated, double block and bleed are available toAPI6D&API6A.
Through Conduit
When full port gate valve is required or double block and bleed valve is mandatory this design must be used. Through conduit gate valves are designed to API 6D or API 6A. These valves are pigeable and normally used for oil and gas application
Parallel Slide Gate Valves
For those applications when large temperature variations are expected or fast shutt-off is required, this is the most ideal design. The seats are parallel and the disc has no contact with the seats during the stroke of the valve. Only at the end of the stroke the disc mechanism ensures the contact between seats and disc.
