Ball Valve 421
DN25-500 PN10-63
Own production
Certificates and full package of documents
Production time from 20 days
Technical Specifications
-
Nominal diameter
— DN 25-500
-
Nominal pressure
— PN10-63
-
Medium temperature
— -29 °C ... +350 °C
-
Types of Valve End Connections
— Flanged, Between Flanges
-
Leakage Class
— «А»
-
Mounting Position
— Any, except for downward-driven devices
-
Types of Control
— — manual (handwheel)— manual (gearbox)— pneumatic actuation
— electric actuation
-
Warranty Period
— 12 months
-
Average Service Life
— 10 000 cycles
-
Guaranteed Service Life
— Not less than 5000 cycles
Technical Drawings and Dimensions
Nominal diameter PN16
Table of Basic Dimensions
| DN | L, mm | D, mm | b, mm | f, mm | n-ød |
|---|---|---|---|---|---|
| 25 | 102 | 115 | 16 | 2 | 4-M14 |
| 32 | 102 | 140 | 18 | 2 | 4-M18 |
| 40 | 114 | 150 | 18 | 2 | 4-M18 |
| 50 | 124 | 165 | 20 | 2 | 4-M18 |
| 65 | 145 | 185 | 20 | 2 | 4-M18 / 8M-18 |
| 80 | 165 | 200 | 20 | 2 | 8-M18 |
| 100 | 194 | 220 | 22 | 2 | 8-M18 |
| 125 | 194 | 250 | 22 | 2 | 8-M18 |
| 150 | 229 | 285 | 24 | 2 | 8-M22 |
| 200 | 243 | 340 | 24 | 2 | 12-M22 |
| 250 | 297 | 405 | 26 | 2 | 12-M26 |
| 300 | 338 | 460 | 28 | 2 | 12-M26 |
| 350 | 400 | 520 | 30 | 2 | 16-M26 |
| 400 | 400 | 580 | 32 | 2 | 16-M30 |
| 450 | 520 | 640 | 40 | 2 | 20-M30 |
| 500 | 600 | 715 | 44 | 2 | 20-M34 |
Product Description
Segment valve model 421 is used for controlling and shutting off the flow of the working medium.
The regulating element has the shape of a hemisphere with a V-shaped cutout, providing an equal percentage control characteristic. The selection of sealing and stuffing box materials ensures reliable valve operation at temperatures up to +350 °C. The valve features a low operating torque thanks to the small friction surface between the segment and the body.
Design features of the model:
- V-shaped segment with a wide selection of wear-resistant coatings
- Equal percentage control characteristic
- Easy maintenance (possible replacement of sealing, stuffing box, segment)
- Low operating torque
- Option for a keyed connection between the segment and the stem
- Short face-to-face length
Working medium:
- Water, steam, condensate
- Phosphoric acid
- Sulfuric acid
- Pulp
- Cellulose
- Petroleum products
- Chemically aggressive media
Body materials:
🔹 Carbon steels
- A216 WCB (1.0619, GP240GH)
🔹 Stainless steels (corrosion resistant)
- ASTM A351 CF8 (1.4308) / AISI 304 / A182 F304 (1.4301)
- ASTM A351 CF8M (1.4408) / AISI 316 / A182 F316 (1.4401)
- A351 CF3 (1.4306) / AISI 304L / A182 F304L
- A351 CF3M (1.4409) / AISI 316L (1.4404)
- AISI 316Ti (1.4571)
- AISI 904L (1.4539)
Segment materials:
- ASTM A351 CF8 (1.4308) / AISI 304 / A182 F304 (1.4301)
- ASTM A351 CF8M (1.4408) / AISI 316 / A182 F316 (1.4401)
- A351 CF3 (1.4306) / AISI 304L / A182 F304L
- A351 CF3M (1.4409) / AISI 316L (1.4404)
- AISI 316Ti (1.4571)
- AISI 904L (1.4539)
Seat materials:
- PTFE / PCTFE
- PEEK / PTFE
- PEEK / Graphite
- DEVLON / PTFE
- AISI304 / AISI316 / AISI904L / AISI316Ti + stellite / tungsten carbide / hard chrome plating / graphite
Fill out the questionnaire
and we'll prepare a customized proposal for you.
Get a consultation engineer
Our specialist will contact you with a detailed technical consultation
We'll respond within 10 minutes
Xiang GuangHe (Raymond)
Technical Expert in Equipment Selection
Currently online