What Is a Gate Valve? Design, Function and Selection Notes
A gate valve is a valve type used for opening and closing the flow path in a pipeline. In the catalog, gate valves are described for on/off service in industrial, constructional, water, wastewater, drinking water, agricultural and non-corrosive liquid applications, depending on the selected valve model.
The gate valve range includes several configurations such as rubber wedge gate valves, Series F4 and F5 gate valves, anti-corrosion rubber wedge gate valves, gate valves with open/close indicator, extended stem gate valves, post indicator / post plate NRS gate valves and OS&Y rubber wedge gate valves.
How a Gate Valve Is Used
The main function described for gate valves in the catalog is on/off service. This means the valve is used where the pipeline needs to be opened or closed.
For Rubber Wedge Gate Valves Series F4 and F5, the catalog mentions use in industrial and constructional fields for drinking water and non-corrosive liquids with a maximum temperature of 80°C.
Gate Valve Types Mentioned in the Catalog
Rubber Wedge Gate Valves Series F4 and F5
Rubber Wedge Gate Valves Series F4 and F5 are used for on/off service in drinking water and non-corrosive liquid lines up to 80°C.
Series F4 is available from DN50 to DN600, and Series F5 is available from DN50 to DN300. These valves are available in PN10, PN16, PN25 and PN40.
Anti-Corrosion Rubber Wedge Gate Valves
Anti-corrosion rubber wedge gate valves are used for liquid flow on/off service in chemical industries, water purifier chlorination stations, municipal and industrial sewage, pools and a wide range of corrosive liquids with a maximum temperature of 80°C.
For these valves, the catalog notes that the rubberized wedge, rubber parts, wedge nut and spindle are designed and selected based on the type of liquid and operating conditions.
Gate Valves with Open/Close Indicator
Gate valves with open/close indicator are equipped with an indicator and are designed for liquid flow on/off service. This configuration is used where the open or closed position of the valve needs to be visible.
The catalog mentions normal and anti-corrosion Series F4 and F5 versions from DN50 to DN200.
Extended Stem Gate Valves
Extended stem gate valves are designed for cases where access to the valve is difficult or where a manhole or basin is not available.
The catalog mentions that these valves can be installed as buried or direct-buried valves, and that stem length can be produced according to customer requirements. Normal and anti-corrosion Series F4 and F5 versions are available from DN50 to DN300.
Post Indicator / Post Plate NRS Gate Valves
Post indicator and post plate NRS gate valves are listed in the gate valve product group. These models belong to the non-rising stem gate valve range.
Rubber Wedge Gate Valves OS&Y
Rubber Wedge Gate Valves OS&Y are used for on/off service in fire safety systems, oil, gas, petrochemical industries and power plants.
The catalog mentions that they are suitable for water and neutral liquids with a maximum temperature of 80°C.
Main Construction Details
For Rubber Wedge Gate Valves Series F4 and F5, the body, wedge and bonnet are made of ductile iron EN1563 GJS400.
The wedge is rubberized with EPDM/NBR according to DIN53538-5.
The spindle is made of stainless steel 1.4021 according to DIN17440, with rolled thread and ultra-burnished sealing surface. The stem and thrust collar are produced as an integrated series.
Standards Mentioned for Gate Valves
Depending on the model, the catalog mentions the following standards:
- DIN3352-4
- ISIRI3363
- EN1092-2
- EN558-1
- DIN3202-1
- DIN53538-5
- DIN17440
- DIN30677
- ISO5208
- ASME B16.5 for OS&Y models
For Series F4 and F5 rubber wedge gate valves, flanges are drilled according to EN1092-2, and face-to-face dimensions are according to EN558-1 Series F4 and F5 / DIN3202-1.
Coating
The catalog states that inside and outside cast iron surfaces are covered with a minimum 250 micron epoxy electrostatic paint coating according to DIN30677.
Hydrostatic Testing
Hydrostatic testing is mentioned according to ISO5208.
For Rubber Wedge Gate Valves Series F4 and F5:
- PN10: body test pressure 15 bar, seal test pressure 10 bar
- PN16: body test pressure 24 bar, seal test pressure 17.6 bar
- PN25: body test pressure 37.5 bar, seal test pressure 27.5 bar
- PN40: body test pressure 60 bar, seal test pressure 40 bar
Selection Notes
Gate valve selection depends on the selected model and project conditions. Based on the catalog information, the main selection points include pressure class, nominal size, face-to-face series, flange standard, liquid type, operating temperature, installation condition and whether the application requires anti-corrosion design, open/close indication, extended stem operation or OS&Y configuration.
Related Products and Categories
Related category: Gate Valves
Related product: Rubber Wedge Gate Valves Series F4 and F5
Related glossary: What Is PN in Valves?
Technical Summary
A gate valve is used for on/off service in pipeline systems. The catalog includes several gate valve configurations, including rubber wedge gate valves, Series F4 and F5 models, anti-corrosion models, open/close indicator models, extended stem models, post indicator / post plate NRS models and OS&Y models.
For Series F4 and F5 rubber wedge gate valves, the catalog mentions ductile iron EN1563 GJS400 construction, EPDM/NBR rubberized wedge, stainless steel 1.4021 spindle, EN1092-2 flange drilling, EN558-1 / DIN3202-1 face-to-face dimensions, epoxy coating according to DIN30677 and hydrostatic testing according to ISO5208.