Type 2973

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1.

General technical data

Product properties

Dimensions

Further information can be found in chapter “4. Dimensions” on page 7.

Material 1.)

Forged steel valve body (VS) 1.)

Forged stainless steel 316L/1.4435/BN2, Fe < 0.5 %/C ≤ 0.03 %

Tube valve body (VP) 1.)

Stainless steel 316L/1.4435/BN2

Cast valve body (VG) 1.)

Cast stainless steel 316L/1.4435

Diaphragm

EPDM (AD) 1.), PTFE/EPDM (EA) 1.), advanced PTFE/EPDM (EU) 1.),

GYLON®/laminated EPDM (ER) 1.)

Actuator

(diaphragm bonnet/handwheel)

Stainless steel/PPS

Diaphragm size

15…50 (65…100 see Type 3232  and Type 3233 )

Standard surface quality 2.)

Forged steel valve body (VS) 1.)

Interior electrically polished: Ra ≤ 0.38 µm (NO17) 1.) (ASME BPE SF4/DIN HE4)

(external forged surface electrically polished)

Interior mechanically polished: Ra ≤ 0.5 µm (NO14) 1.) (ASME BPE SF1)

(external forged surface)

Tube valve body (VP) 1.)

Interior electrically polished: Ra ≤ 0.38 μm (NO17) 1.) (ASME BPE SF4/DIN HE4)

(external electrically polished)

Interior glass bead blasted: Ra ≤ 1.6 μm (NO05) 1.)

(external glass bead blasted (NO01) 1.))

Cast valve body (VG) 1.)

Interior electrically polished: Ra ≤ 0.6 µm (NO16) 1.) (ASME BPE SF6)

(external cast surface electrically polished)

Interior mechanically polished: Ra ≤ 0.76 µm (NO06) 1.) (ASME BPE SF3/DIN H2)

(external cast surface)

Medium data

Operating medium

Neutral gases and liquids, highly purified, sterile, aggressive or abrasive media

(see resistance chart )

Medium temperature

EPDM (AD) 1.)

- 10…+ 143 °C (steam sterilisation + 150 °C for 60 min)

PTFE/EPDM (EA) 1.)

- 10…+ 130 °C (steam sterilisation + 140 °C for 60 min)

Advanced PTFE/EPDM (EU) 1.)

- 5…+ 143 °C (steam sterilisation + 150 °C for 60 min)

GYLON®/laminated EPDM (ER) 1.)

- 5…+ 130 °C (steam sterilisation + 140 °C for 60 min)

Process/Port connection & communication

Nominal diameter

DN 08…DN 65 (¼"…2 ½”)

Port connection 2.) for stainless steel valve body 3.)

Welded connection 2.)

DIN EN ISO 1127/ISO 4200/DIN 11866 series B

DIN 11850 series 2/DIN 11866 series A/DIN EN 10357 series A

ASME BPE/DIN 11866 series C

Clamp connection 2.)

DIN 32676 series A (DIN pipe)

DIN 32676 series B (ISO pipe)

ASME BPE

Environment and installation

Installation position

See operating instructions Type 2973 

Ambient temperature: actuator (diaphragm bonnet/handwheel)

Stainless steel/PPS

- 10…+ 130 °C (short-term up to + 150 °C), autoclavable

1.) This information is part of the product key (see “6.3. Bürkert Product Enquiry Form” on page 20).

2.) Further versions are available on request.

3.) Tube valve body (VP) also available with flange and threaded connections