A DIN F4/F5 Rising Stem Metal Seated Gate Valve is a heavy-duty isolation valve designed for industrial applications where visual confirmation of the valve position and high-temperature durability are required. Unlike Non-Rising Stem (NRS) versions, the stem of this valve moves up and down during operation, indicating whether the valve is open or closed.
1. Key Terminology
Rising Stem (OS&Y - Outside Screw and Yoke): The stem is threaded on the outside. When the handwheel is turned, the stem rises vertically along with the gate. This protects the stem threads from the media and allows operators to see the valve's status at a glance.
DIN F4 vs. F5: * F4 (Short Series): Compact face-to-face length (EN 558 Series 14).
F5 (Long Series): Extended face-to-face length (EN 558 Series 15), providing a more robust body.
Metal Seated: The seal is formed by the contact of metal rings (Brass, Bronze, or Stainless Steel) on both the wedge and the body, offering superior resistance to heat and wear.
Technical Attributes
1,Design Standard,DIN 3352 Part 2 / EN 1171 / EN 1074
2,Face-to-Face (F4),DIN 3202 F4 (Short Series) / EN 558 Series 14
3,Face-to-Face (F5),DIN 3202 F5 (Long Series) / EN 558 Series 15
4,Stem Type,Rising Stem (OS&Y)
5,Sealing Type,Metal-to-Metal (Hard Seal)
6,Pressure Class,PN10 / PN16 / PN25
7,Body Material,Cast Iron (GG25) or Ductile Iron (GGG40/50)
8,Bonnet Material,Ductile Iron GGG50 (with Yoke for stem support)
9,Wedge Material,Cast/Ductile Iron with Metal Seat Rings
10,Body Seat Ring,"Brass, Bronze, or Stainless Steel (Pressed-in)"
11,Wedge Seat Ring,"Brass, Bronze, or Stainless Steel (Pressed-in)"
12,Stem Material,Stainless Steel AISI 420 / 304 / 316
13,Stem Nut,High Tensile Brass / Bronze (Located outside the body)
14,Packing Material,Flexible Graphite (Standard) or PTFE
15,Tightness Class,EN 12266-1 Rate B / Rate C
16,Flange Connection,EN 1092-2 / DIN 2501
17,Shell Test Pressure,"1.5×PN (e.g., 24 Bar for PN16)"
18,Seat Test Pressure,"1.1×PN (e.g., 17.6 Bar for PN16)"
19,Temperature Range,0°C to +200°C (Higher with specialized alloys)
20,Coating,Anti-corrosive primer or High-Temp Heat Resistant Paint
21,Flow Configuration,Full Bore (Unobstructed straight-through flow)
Contact: Jorge Yang
Phone: +86-13588258503
E-mail: sales@fluvalve.com
Whatsapp:+86-13588258503
Add: Room 331, South Building,Building 1, No.3 Jinpeng Street, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province
