Hygienic double seal valves N4

RIEGER hygiene double seal valves N4 are piggable or can be used for highly viscous media.
They offer reliable protection for your product by separating incompatible products in a leak-proof manner. They have proven their worth worldwide in plants in the food and beverage industry.

The design of the one-piece solid valve body and the two radial seals of both valve seats, together with the balanced valve discs, enable completely safe CIP/SIP cleaning and therefore extremely high safety for your products.

On this model, the two valve seats can be lifted alternatively.

RIEGER double seal valves DD – piggable

The further development of the RIEGER double seal valve DD to the piggable version N4 offers the user great potential for saving resources.

The costs saved on product, water, cleaning agents and environmental pollution amortize the investment within a very short time.

Material product touched
not in contact with the product
Seals O-rings/seals EPDM
(others on request)
Temperatures maximum EPDM
Continuous operating temperature
Sterilization temperature
130 °C*
150 °C*
Press Closing pressure

Control air pressure

max. 10 bar top.
Lower cable see catalog

min 6 bar –
max. 10 bar

Surfaces product touched

not in contact with the product

Ra ≤ 0.8 µm
e-polished, other surfaces on request
Ra ≤ 1.6 µm
Pipe classes
DIN 11850-R2 (DIN 11866 A)
O.D. tube (DIN 11866 C)
DIN EN ISO 1127 (DIN 11866-B)
*dependent on operating parameters

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