DN500-PN10 Cast Iron Metal Seated Rising Stem Gate Valve

Description

Outside Screw and Yoke (OS&Y) Gate Valve
(Bronze-Seated, Metal-to-Metal Design)

Product Name: OS&Y Solid Wedge Gate Valve (Bronze Seated)
Standard: DIN 3352
Size: DN500 (20 inches)
Pressure: PN10

Type: Outside Screw and Yoke (OS&Y), Solid Wedge, Flanged Ends
Design Standard: DIN 3352
Face-to-Face Standard: DIN 3202 F4
Seat Type: Metal-to-Metal (Bronze Seated)
Stem Design: Rising stem (indicates open/close position)
Operation: Handwheel Operated (Gearbox is mandatory for DN500 metal-seated valves due to high seating torque)
Application: High-temperature fluids, Oils, Steam, Abrasive media, or where rubber is not suitable.

Item	Unit	Parameter
Nominal Diameter	mm	DN500 (20″)
Nominal Pressure	PN	10
Working Pressure	bar	10 bar (1.0 MPa)
Shell Test Pressure	bar	15 bar (1.5 x PN)
Seal Test Pressure (Metal Seat)	bar	11 bar (1.1 x PN)
Working Temperature	℃	-10°C ~ +200°C (or higher) *
Suitable Medium	–	Water, Steam, Oils, Gases, High-temp fluids

*Note: Temperature range depends on the specific bronze alloy and gland packing material.

Component	Specified Material	Notes / Alternative
Body	Ductile Iron (DI)	GGG-40 or GGG-50 (EN-JS 1030/1050)
Wedge / Disc	Ductile Iron (DI)	Solid wedge design
Seat Ring (Body)	Bronze	Corrosion-resistant ring pressed or welded into the body.
Seat Ring (Wedge)	Bronze	Both seating surfaces are Bronze for metal-to-metal sealing.
Stem	Stainless Steel	Typically 2Cr13, X20Cr13, or SS304/SS420
Stem Nut	High-strength Brass / Aluminum Bronze	Located in the Yoke
Bonnet	Ductile Iron (DI)	GGG-40 or GGG-50
Gland Packing	Graphite / PTFE	For high-temperature stem sealing
Handwheel	Cast Iron / Malleable Iron	Must be fitted with a Gearbox for DN500
Coating	Epoxy Resin (Fusion Bonded)	Min thickness > 250 microns, Color Blue RAL5005 (or as specified)

*Note: Dimensions based on DIN standards. Request certified drawing for exact values. *

Dimension Item	Value (mm)	Notes
Face-to-Face Length (L)	350 mm	DIN 3202 F4 (Short pattern)
Flange Diameter (D)	670 mm	DIN 2501 / EN 1092-2 PN10
Bolt Circle Diameter (PCD/K)	620 mm	DIN 2501 PN10 Standard
Number of Bolt Holes	20	Typically 20 holes for DN500 PN10
Bolt Hole Diameter (d0)	26 mm	For M24 bolts (approx)
Overall Height (H) (Open)	Approx. 1600 – 2000 mm	Height from centerline to top of handwheel (open position). Varies by manufacturer.
Weight (approx)	Approx. 550 – 700 kg	Metal-seated valves are heavier. Confirm with supplier.

“Bronze Seated” Definition:
- This data sheet reflects a true Bronze-to-Bronze seal. The wedge has a Bronze ring/face that mates with the Bronze seat in the body.
Torque Requirement (Mandatory Gearbox):
- For a DN500 PN10 metal-seated valve, a gearbox (worm gear) is NOT optional – it is mandatory. The solid wedge and metal-to-metal contact create very high seating and unseating torque. Please confirm the gearbox ratio with the supplier.
Leakage Rate:
- Metal-seated valves cannot achieve “zero leakage” (bubble tight) like resilient-seated valves. They typically conform to ISO 5208 Rate D (0.1x DN mm³/s) or Rate E. Please confirm the acceptable leakage rate for your application.
DIN 3352 Structure:
- DIN 3352 is a multi-part standard. Your valve most likely conforms to DIN 3352 Part 4 or Part 5 for cast iron gate valves, or a specific metal-seated variant.

Action Required:
Please confirm with the manufacturer:

Gearbox Ratio & Output Torque (Is it suitable for manual operation under max differential pressure?)
Sealing Leakage Rate (ISO 5208 Rate D or better?)
Flange drilling details (DIN 2501 PN10) to match your pipeline.