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Ball valve AT 3500, 3520

Ball valve with reduced bore in stainless 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 15 to 100
PN125 to 64
Temperature Range-30ºC to + 260ºC
MaterialStainless Steel

Variations

Article number Body material DN PN Temperature (°C) Connection Amount
AT 3500-10 Stainless Steel 10 125 -30-220 Welding

Product information

Main Facts

Dimension rangePNTemperature rangeMaterial

DN 15-100

125-64-30 - 260 ºC

Stainless Steel

Range of Application

Shut-off valve mainly for:
- Caustic solutions, acid and salt solutions
- Solvents and alcohols
- LPG, natural gas and petroleum products.
- Warm and cold water, compressed air.
- Saturated steam

Program text

PSB.1 Ball Valves
Ball valve in Stainless Steel AT 3500 ..., with reduced bore, weld ends and stainless steel lever. Gasket box of CPTFE.

Ball valve Stainless Steel AT 3520 ..., with reduced bore, threads and stainless steel lever. Gasket box of CPTFE.

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.

CE-marking

The valves meet the demands from PED, AFS 2016:1, the directive for pressure equipment, according to category III, fluid group 1 and 2. Dimensions to DN 25 satisfies § 8 of the PED, AFS 2016:1.

Surface

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

Material specification

AT3500/3520

1Body

Stainless Steel
1.4408

2BallStainless Steel
1.4401
3StemStainless Steel
1.4401
4Body gasketPTFE
5Seat ring*PTFE, carbon-filled
6Stem sealPTFE, glass-reinforced
7Stem gasketPTFE, carbon-filled
8Centering ringPTFE, glass-reinforced
Stainless Steel
9End pieceStainless Steel
1.4409
10LeverStainless steel
*Also available with Glass-filled PTFE or PEEK.

Function and Design

Three-piece ball valve for simple service and maintenance.
When valve is in open position, no disassembling or changing of gaskets is necessary when the valve is welded in.
Homogenous and floating ball for tight shut-off and low pressure drop.
Self-compensating stem packing gives a tight valve even 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 bigger than DN50 have round body and mounting flange.

Technical Information

Pressure and temperature, reduced bore AT 3500, 3520
Seat materialDN 15-32DN 40-65DN 80-100

Standard, CPTFE, Carbon filled PTFE 25%

Max. working pressure bar(g)*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)

PEEK

Max. working pressure bar(g)*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, glasfiberarmerad

Max. working pressure bar(g)*
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

Torque
DN1520253240506580100
Nm911121928375268100

Torque above is applied for all seating material avaiable, CPTFE, PEEK or Glass-filled PTFE

Kvs value

Kv-value reduced and full bore
DN1520253240506580100
KVS6,912,729,248,273,1107,5215275,2498,8

AT 3500 meassurements welded ends

AT 3500 Meassurements welded ends
DN1520253240506580100
Dy21,326,933,742,448,360,376,188,9114,3
Di18,123,729,738,444,355,170,983,7109,1
Material thickness1,61,62,02,02,02,62,62,62,6

Measurements internal threads

AT 3520 Measurements BSP threads
DN152025324050
G1/23/411 1/41 1/22
E20,9526,4433,2541,9147,859,61
K16,517,520,520,524,525,5
W273341515668
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:

  • SMS3008
  • DIN/SCH40
  • 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.


Installation

Valves with weld ends can be welded in without disassembling, provided that the ball is in open position. See separate manual.

Maintenance and Spare parts

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

Marking

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

How to order

DNAT 3500, weld endsAT 3520, threadsAT 3547
Article No.RSK-No.Article No.RSK-No.


How to order cont.

Options:

Seals:

FS = Fire-safe

GF = 25% glass-filled PTFE

PEEK = Seats in PEEK-material 

See separate Pressure/temperature diagrams for differents seats.

Anslutningar:

DIN = Weld ends acc. DIN/SCH40

SMS = Weld ends acc. SMS3008

NPT = NPT-threads 

Exemple:

AT 3500-25FS (Fire-safe execution)

AT 3500-25GF (Seats of glass-filled PTFE)

AT 3520-25PEEK (Seats of PEEK)

AT 3500-25DIN (Weld ends acc. DIN3239, 1 and 2)

AT 3500-25SMS (Weld ends acc. SMS3008 )

AT 3520-25NPT (NPT-threads)

Accessories

Electric actuator AT 3941 (100-800 Nm)

Electric actuator for on/off or control of ball valves, butterfly or where a 90° rotation is required.

Select

Pneumatic actuator AT 3840

Pneumatic actuator for on-off and control of ball valves, butterfly valves or where 90° rotation is…

Select

Pneumatic actuator AT 3841

Pneumatic single acting actuator for on-off and control of ball valves, butterfly valves or where 90°…

Select

Actuator AT 3830

Pneumatic double acting actuators for on-off and control of ball valves and butterfly or where 90°…

Select

Pneumatic Actuator AT 3831

Pneumatic single acting actuator for on-off and control of ball valves and butterfly valves or where…

Select