Rising Stem(OS&Y) Gate valve DN50-DN600

Design Standard:BS5163,DIN3352

Face to face dimensions: BS5163,DIN3202 F4,F5

Flange:BS4504 PN10,PN16,PN25

Each valve be tested according to test standard: BS5163,DIN3230

Work Temperature: 0-80°C

Working Pressure:PN10,PN16

Size:DN50-DN600

Materials:

Body: Ductile Iron(GGGG50)

Bonnet: Ductile Iron(GGGG50)

Wedge:Ductile iron coated by NBR or EPDM

Stem:2Cr13

Stem nut:Ductile iron(GGGG50)

Gland:Ductile iron(GGGG50)

O ring:NBR

Gasket:NBR

Bonnet Bolts:Steel 8.8+Wax

Handwheel:Cast Iron(GG25) or Ductile iron(GGG50),or steel

Ductile iron resilient seated rising stem gate valve

A flanged resilient seated rising stem gate valve typically includes the following features:

The valve features an outside stem and yoke, operates clockwise to close, and has silicone-filled bolt holes to prevent water pooling and corrosion. It also includes double shaft seals and twin lip seals to prevent ingress and egress of media and foreign material.

What are the key differences between rising and non-rising stem gate valves?

The key differences between rising stem and non-rising stem gate valves include:

Valve Position Indication: Rising stem valves provide a clear visual indication of the valve position, while non-rising stem valves do not.
Space Requirements: Non-rising stem valves are better for limited vertical space as the stem does not move up and down.
Maintenance: Rising stem valves are generally easier to maintain due to the visible stem.
Protection: Non-rising stems are less susceptible to external damage since the stem does not extend outside the valve body.
Operation: In rising stem valves, the gate moves up or down along with the stem, whereas in non-rising stem valves, the gate moves independently of the fixed-position stem.

These differences should be considered when selecting a gate valve for a specific application to ensure optimal performance and longevity.