Cast Iron Flanged Gate Valve
Product Introduction
Keylion® cast iron flanged gate valve is engineered for exceptional performance in water flow control. Constructed from high-strength ductile iron with flanged ends for secure, leak-proof pipeline integration, it excels as a mainline isolation valve. The Outside Screw and Yoke (OS&Y) design provides a clear visual indication of open or closed status while keeping the stem threads protected from the medium. This ensures reliable, low-maintenance operation in potable water systems, municipal distribution networks, fire protection lines, and industrial water treatment plants. Its robust design guarantees tight, bidirectional sealing, minimal pressure drop, and long-term durability in demanding aqueous environments.
Product Parameter
Product Name:Cast Iron Flanged Gate Valve
Connection:Flange End
Body Material:Ductile Iron
Standard:ANSI/GB/BS
Size:DN50,DN65,DN80,DN100,DN125,DN150,DN200,DN250,DN300
Working Pressure:PN10,PN16,PN20,PN25
Color:Red/Blue
Working Temperature Range:0℃ to 80℃(32℉ to 176℉)
Surface Finishing:Epoxy Paint Coating
Application Medium:Water
Material
|
Part |
Material |
|
|
Standard |
Optional |
|
|
Body |
Ductile Iron QT450-10 |
|
|
Stem |
2CR13 Stainless Steel |
201 Stainless Steel |
|
Bonnet |
Ductile Iron QT450-10 |
|
|
Handwheel |
Ductile Iron QT450-10 |
|
|
Disc |
Ductile Iron QT450-10,Covered By EPDM |
|
|
Nut |
Ductile Iron |
Brass |
|
Bolt |
Ductile Iron |
Brass |
|
O-Ring |
NBR |
EPDM |
FAQ
Q1: Grooved vs flanged valves – which is better?
|
Feature |
Grooved |
Flanged |
|
Install Speed |
3x faster (no bolts) |
Slow (needs alignment) |
|
Pressure |
Up to 25 bar |
Up to 25 bar |
|
Cost |
Cheaper upfront |
Higher, but lasts longer |
|
Best For |
Temporary/renovation jobs |
Permanent heavy-duty use |
Q2:What is a flanged rising stem gate valve?
It's a valve with a visible stem that moves up/down when opening/closing. Ideal for water treatment plants where operators need to see the valve status at a glance.
Q3: What are the main types of gate valves?
Gate valves are categorized by design, stem type, and connection method:
By Design:
Wedge Gate Valve (Solid, Flexible, or Split Wedge)
Parallel Slide Gate Valve
Knife Gate Valve
By Stem Type:
Rising Stem (Visible stem movement)
Non-Rising Stem (Stem remains fixed)
By Connection:
Flanged (Bolt-on)
Grooved (Clamp-on)
Threaded (Screw-in)
Q4:How does a flange rising stem gate valve work, and why is the stem design important?
The threaded stem lifts vertically out of the valve body when rotated counterclockwise, physically raising the gate to allow flow. The rising stem provides instant visual confirmation of valve status – critical for safety in emergency shutdowns or maintenance. Unlike non-rising stems, you'll never guess if it's fully open/closed.
Q5: Can this valve be installed upside-down or horizontally?
Yes – but with orientation tips:
✅ Horizontal pipes: Install with stem vertical (prevents debris settling on threads)
✅ Vertical pipes: Stem must point upward (gravity keeps stem nut engaged)
❌ Never inverted: Stem-down installation risks dirt ingress and thread damage.
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