Type 2960

13 | 15

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Operating limits seat seal

Tight sealing required

Leakage class (DIN EN 60534 - 4)

Medium temperature

Seat seal

No

An additional shut-off valve

is recommended.

III (metallic sealing)

Metal-sealed valves have larger leakages

(0.1 % of the nominal flow rate are permissible).

Metal seals are impervious even under

demanding process conditions, but can wear

more quickly in manually operated actuators

due to the rotating spindle during closure.

- 40…+ 230 °C

Stainless steel

Yes

An additional shut-off valve

is often unnecessary.

VI (soft seals)

By using plastics as sealing material, the

control valves can close tightly.

Their use is not recommended in cases of

increased erosion due to demanding process

conditions.

- 40…+ 130 °C

(recommended for ≤ + 130 °C)

PTFE

- 10…230 °C

(recommended for > + 130 °C)

PEEK

Operating limits for optional versions

High-temperature version

Thanks to an adaption of the spindle sea, this version is suitable for applications with steam, neutral gases and other heat transfer mediums

up to + 230 °C.

Water version

For applications with water up to + 200 °C, a special configuration of the spindle seal increases service life significantly.It is recommended

for all water applications.

Drinking water version

The materials comply with the assessment principles (UBA) for materials in contact with drinking water up to + 85 °C.

Low-temperature version

Suitable for minimum medium temperatures down to - 40 °C