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Ball valve AT 3545, 3565

Ball valve with full bore in carbon steel/CPTFE with weld ends or threaded and mounting flange for actuators. Suitable for actuators. Three-piece construction for easy service and maintenance.

Dimension rangeDN 8 to 100
PN125 to 64
Temperature range-10ºC to + 260ºC
MaterialCarbon steel


Article number Body material DN PN Temperature (°C) Connection Amount
AT 3545-15 Stainless steel 10 125 -10-220 Welding

Product information

Main Facts

Dimension rangePNTemperature rangeMaterial

DN 8-100

125-64-10ºC to + 260 ºC

Carbon steel

Range of Application

Shut-off valve mainly for:
- Natural gas and petroleum products.
- Warm and cold water, compressed air.
- Saturated steam

Program text

PSB.1 Ball Valves

Ball valve Carbon steel AT 3545 ..., with full bore, weld ends and stainless steel lever. Packing of carbon filled PTFE.

Ball valve Carbon steel AT 3565 ..., with full bore, threads and stainless steel lever. Packing of carbon filled PTFE.

Quality Assurance

Tested according to SS-ISO 5208. Leakage class A applies to this valve type.
The valves are approved by TA-luft.
Certificate SS-EN 10204, type 2.2 and 3.1, has to be specified when ordering.


The valves meet the requirements of PED, AFS 2016:1 acc. to category III group 1 and 2. Dimensions to DN 25 satisfies § 8 of the PED, AFS 2016:1.


Standard surface finish below 3.1 µm for body & ball. Finer surface finish on request.

Material specification


AT 3545/3565


Carbon Steel

2BallStainless steel
3StemStainless steel
4Body gasketPTFE
5Seat ring*PTFE, carbon filled
6Stem gasketPTFE, glass-reinforced
7Box gasketPTFE, carbon-filled
8Centering ringPTFE, glass-reinforced
Stainless steel
9End pieceCarbon Steel
10LeverStainless steel
*Seats in other material on request, such as glass-reinforced PTFE or PEEK.

Function and Design

Three-piece ball valve in antistatic design for simple service and maintenance.
Homogenous floating ball for tight shut-off and low pressure drop.
Self-compensating stem packing gives a tight valve also with high operation frequency.
The design with blow-out safe stem prevents the stem to blow out at pressure hammer.
Mounting flange according to ISO 5211 for actuators.
No dismantling of valve at service and maintenance.
Valves from DN50 have round body and end piece.

Technical Information

Pressure and temperature, valves with full bore 3545, 3565
Seat material8-2532-4050-100
Standard, carbon filled PTFE 25%Max. working pressure bar(e)*125 (T ≤ 50°C)100 (T ≤ 80°C)70 (T ≤ 80°C)

Max. temperature °C**205 (P ≤ 10 bar)205 (P ≤ 10 bar)200 (P ≤ 10 bar)
PEEKMax. working pressure bar(e)*125 (T ≤ 100°C)100 (T ≤ 100°C)70 (T ≤ 100°C)
Max. temperature °C**250 (P ≤ 10 bar)245 (P ≤ 10 bar)235 (P ≤ 10 bar)
PTFE, glass-reinforcedMax. working pressure bar(e)*
Max. temperature °C**

Pressure and temperature acc. to applied standards. Note that the pressure- and temperatures above is not related.

*Max pressure bar(g) up to specified temperature.

**Max temperature °C up to the specified pressure.



Torque above applies for: Carbon filled PTFE, PEEK and glass-reinforced PTFE.

Kvs value


AT3545 meassurements welded ends

AT 3545 Meassurements weld ends
Material thickness2,232,4852,973,123,683,813,833,9953,453,854

Measurements internal threads

AT 3565 Measurements BSP threads
G1/23/411 1/41 1/22
No. of threads141411111111

Measurements in mm.

Accessories and Options

Can be provided with different types of actuators and limit switches. (See separate datasheet AT 3830, AT 3831, AT3840, AT3841, AT 3940, AT 3941, AT 3910, AT 3911). Can also be supplied with stem extensions and dead-mens handle (open or close).

Other ends available:

Weld ends: 

  • ISO1127-1
  • Costumer specific weld ends on request

Threaded ends:

  • NPT
  • BSPT

Special executions:

  • Firesafe acc. API607 and ISO 10497
  • Heating jacket
  • V-port ball with 30, 60 or 90 degree angle.


See separate manual.

Maintenance and Spare parts

The valve construction permit a simple exchanging of all parts. See separate installation- and maintenance instructions.


Manufacturer, DN, PN, material, CE and on special valves flow direction arrow.

How to order

DNAT 3545, weld endsAT 3565, threads
Article No.Article No.

How to order cont.



FS = Fire-safe

GF = 25% glass-filled PTFE

PEEK = Seats in PEEK-material

See separate Pressure/temperature diagrams for differents seats.


ISO = weld ends acc. ISO1127-1

NPT = NPT-threads


AT 3545-25FS (Fire-safe execution)

AT 3545-25GF (Seats of glass-filled PTFE)

AT 3545-25PEEK (Seats of PEEK)

AT 3545-25SMS (Weld ends acc. SMS3008 )

AT 3565-25NPT (NPT-threads)


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