Gate Valve Flange Type

Engineered for easy servicing, the Gate Valve Flanged Type features accessible stem threads that can be lubricated without disassembly. The modular design of this gate valve flanged type allows quick packing replacement—simply loosen the gland bolts without any special tools. Ideal for municipal water districts, plant maintenance teams, and facilities with aging infrastructure where serviceability is key, the gate valve flanged type is available in 2"–14" sizes with Class 150 ratings. Built to handle daily cycling in high-use environments, it features bronze stem nuts that provide years of smooth operation.

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Product Introduction

Engineered for easy servicing, the Gate Valve Flanged Type features accessible stem threads that can be lubricated without disassembly. The modular design of this gate valve flanged type allows quick packing replacement-simply loosen the gland bolts without any special tools. Ideal for municipal water districts, plant maintenance teams, and facilities with aging infrastructure where serviceability is key, the gate valve flanged type is available in 2"–14" sizes with Class 150 ratings. Built to handle daily cycling in high-use environments, it features bronze stem nuts that provide years of smooth operation.

Product Parameter

Product Name:Flanged Rising Stem Gate Valve/Flanged OS＆Y Gate Valve

Connection:Flange End

Body Material:Ductile Iron

Standard:ANSI/GB/BS

Size:2",2.5",3",4",5",6",8",10"12"

Working Pressure:1.6Mpa

Color:Red/Blue

Working Temperature:0℃ to 80℃(32℉ to 176℉)

Surface Finishing:Epoxy Paint Coating

Application Medium:Water

Product Material

Part	Material
Part	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: Why is the rising stem useful in water emergencies?

During floods or pipe bursts:
✅ See valve status instantly – No guesswork in murky pump rooms
✅ Quick shutoff – Lower stem = closed (clockwise 8-10 turns)
✅ Identify failures – Stems that won't rise signal obstructions
Critical for fire departments, plant operators, or building managers handling water leaks. Always pair with accessible installation locations.

Q2:Do check valves replace gate valves in pumps?

Never! Check valves only protect pumps from backflow. Always add a gate valve:
·To isolate pumps for service
·To manually control flow direction
·To verify closure visually
Omitting it risks unsafe maintenance.

Q3: Can I install both valve types together?

A: Yes – ideal setup:
1.Gate valve upstream (manual shutoff)
2.Check valve downstream (backflow prevention)
Example: Pump → Gate Valve → Check Valve → Pipeline
This allows safe maintenance while preventing reverse flow. Use full-bore gate valves to avoid flow restriction.

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