Butterfly Valve 303

DN400-2400 PN10-25

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Comprehensive Documentation

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Technical Specifications

Nominal diameter DN 40-2400
Nominal pressure PN10, PN16, PN25
Medium temperature -15 °C ... +110 °C
Types of Valve End Connections Flanged, wafer, lug
Leakage Class «А»
Mounting Position Any, except for downward-driven devices
Types of Control — manual (lever) 
— 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	D, mm	D1, mm	L, mm	n-ød
400	580	525	102	4-M27
450	640	585	114	4-M27
500	715	650	127	4-M30
600	840	770	154	4-M33
700	910	840	165	4-M33
800	1025	950	190	4-M36
900	1125	1050	203	4-M36
1000	1255	1170	216	4-M39
1100	1355	1270	254	4-M39
1200	1485	1390	254	4-M45
1400	1685	1590	279	4-M45
1500	1820	1710	318	4-M52
1600	1930	1820	318	4-M52
1800	2130	2020	356	8-M52
2000	2345	2230	406	8-M56

Tabulated data for DN2100 diameters is available upon request

Product Description

Butterfly Valve (Type 303) designed for regulating and shutting off the flow of working media.

A distinctive feature of this model compared to type 301 is the larger range of diameters and shortened face-to-face length, which allows installation in limited-space conditions. Additionally, the valve design features reduced weight.

Design features of the model:

Shortened face-to-face length
Replaceable seat sealing
Lightweight construction

Sealing materials:

🔹 EPDM, NBR

Valve bodies can be manufactured from various materials depending on the application:

🔹 Ductile iron
EN-GJS-400-15 / GGG40

🔹 Carbon steel
A216 WCB (1.0619, GP240GH)
A216 WCB (1.0619, GP240GH) + EPDM

Valve discs can be made from the following materials:

🔹 Stainless steels (corrosion-resistant)
A351 CF8 (1.4308) / AISI 304 / A182 F304 (1.4301)
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)

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