Din Pn25 Manual Cast Steel Gate Valve , Bolted Cover Metal Seated Gate Valve

Wedge Gate Valve Cast Steel Din Pn25 Bolted Cover Metal Seal Manual Sluice Valves


Valve Construction
Gate valves are actuated by a threaded stem which connects the actuator (e.g. handwheel or motor) to the gate. They are characterised as having either a rising or a nonrising stem, depending on which end of the stem is threaded. Rising stems are fixed to the gate and rise and lower together as the valve is operated, providing a visual indication of valve position. The actuator takes the form of a nut which is rotated around the threaded stem to move it. Nonrising stem valves are fixed to, and rotate with, the actuator, and are threaded into the gate. They may have a pointer threaded onto the upper end of the stem to indicate valve position, since the gate's motion is concealed inside the valve. Nonrising stems are used underground or where vertical space is limited.


Quick Details:

1. Type: Din Pn25 Gate Valves
2. OS&Y, Bolted Bonnet, Solid or Flexible Wedge Design
3. Size Range: Dn50 to Dn600
4. Pressure Ratings: Pn25
5. Materials Available in: Cast Steel GS-C25, 1.4308, 1.4408, WCB, LCB, CF8, CF8M, CF3, CF3M, WC6, WC9, C5, C12 or Equivalent;
6. Various trim materials are available to suit different service conditions
7. Actuator: Manual, Handwheel
8. NACE MR 0175 on request



Design Standard DIN3352
Face to Face DIN3202
Flange Ends DIN2543-2545
Test & Inspection DIN3230



1. Bonnet Gasket Style

Stainless steel + flexible graphite combined gasket;

Stainless steel + flexible graphite wounded gasket;

Ring joint gasket;

2. Packing Seal

Flexible graphite is used for packing material. PTFE or combined packing material can be also used.

3. Body and Bonnet Connection

Bolted Bonnet design. (B.B)

4. Seat

For carbon steel gate valve, the seat is usually forged steel. The seat sealing surface is overlaying welded with hard alloy specified by the customer. For Stainless steel gate valve, the seat is integral with body, or it can be machined directly after hard alloy welded. Threaded or welded type seat is also optional for stainless steel gate valve.

5. Disc Design
NPS≥2 Gate valves are flexible wedge gate, NPS<2 Gate valves are solid wedge gate.

6. Backseat Design

All gate valves have backseat design. 

7. Stem Design

The stem is integral forged design.

8. Stem Nut

Usually, the stem nut is made of ASTM A439 D2. It is also can be made of copper alloy or other materials if being requested by the customer.

9. Operation

Hand wheel or bevel gear box is usually used for gate valve operation, electric actuator also can be used for gate valve operation if being requested by the customers.

Din Gate Valve Drawing


1. Cast Steel Gate Valve Parts and Material List:


Parts Name Material
CS/Trim 1 CS/Trim 8 CS/Trim 5 Stainless Steel
1 Body DIN 17245 GS-C25+CR 13 DIN 17245 GS-C25+STL DIN 17245 GS-C25+STL DIN 17445 1.4308 DIN 17445 1.4408
2 Wedge DIN 17245 GS-C25+CR 13 DIN 17245 GS-C25+CR 13 DIN 17245 GS-C25+STL DIN 17445 1.4308 DIN 17445 1.4408
3 Stem ASTM A182 F6a ASTM A182 F304 ASTM A182 F316
4 Nut A194 2H A194 8 A194 8
5 Bolt A193 B7 A193 B8 A193 B8
6 Gasket SS Spiral Wound W/graphite, or SS Spiral Wound W/ PTFE, or Reinforced PTFE
7 Bonnet DIN 17245 GS-C25+CR 13 DIN 17245 GS-C25+CR 13 DIN 17245 GS-C25+CR 13 DIN 17445 1.4308 DIN 17445 1.4408
8 Packing Braided Graphite or Reformed Graphite Ring or PTFE
9 Gland ASTM A182 F6a ASTM A182 F304 ASTM A182 F316
10 Gland Flange DIN 17245 GS-C25 DIN 17445 1.4308 DIN 17445 1.4408
11 Stem Nut Copper Alloy or A439 D2
12 Hand Wheel Ductile Iron or Carbon Steel


2. Main Connection Dimensions:

Din Gate Valve Dimensions Drawing

PN2.5MPa DIN3202-F5
Size (mm) 50 65 80 100 125 150 200 250 300 350 400 450 500 600
L-RF 250 270 280 300 325 350 400 450 500 550 600 650 700 800
W 200 280 280 300 350 350 400 450 500 600 600 650 700 800

3. Hydro Test Specifications:


Nominal Pressure (MPa) Shell Test (MPa) Sealing Test(MPa) Suitable Medium
1.6 2.4 1.76 Water, Oil & Gas
2.5 3.75 2.75
4.0 6.0 4.4
6.4 9.6 7.04


Cast Steel Gate Valve

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