{"id":5228,"date":"2024-03-25T21:16:16","date_gmt":"2024-03-25T20:16:16","guid":{"rendered":"https:\/\/rr-rieger.com\/ventile\/aseptic-double-seat-valves-n7\/"},"modified":"2025-12-22T14:23:45","modified_gmt":"2025-12-22T13:23:45","slug":"aseptik-doppelsitzventile-n7","status":"publish","type":"ventile","link":"https:\/\/rr-rieger.com\/en\/valves\/aseptik-doppelsitzventile-n7\/","title":{"rendered":"Aseptic double-seat valves N7"},"template":"","meta":{"product_description":"

The RIEGER N7 double-seat valve (also known as a double chamber valve) ensures reliable separation of the process rails through the CIP\/SIP-capable leakage chamber. CIP\/SIP valves control the steam inlet and condensate outlet at the leakage chamber. The excellent aseptic properties are achieved by hermetic separation from the environment.<\/p>\n

Rieger does not rely on metal bellows in the fruit sector, e.g. for yoghurt with strawberries, but on the PTFE-metal combination bellows, which combines the durability of the PTFE bellows (more than 1 million switching cycles) with the erosion-free sealing technology of the O-ring!<\/p>\n

This valve is indispensable in aseptic valve manifolds and on aseptic filling machines where the highest value is placed on comprehensive product safety.<\/p>\n

Left in the picture: Tube variant<\/p>\n

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\u00a0<\/p>\n

Another variant is the aseptic double-seat valve N7 (also called double chamber valve) as a tank outlet valve. As with the version for piping, the separation of the product from the environment is completely guaranteed.<\/p>\n

Thanks to their innovative design, the PTFE bellows guarantee an extremely long service life (more than 1 million strokes). They do not block when the valve is opened so that the pleats always remain open and can be cleaned properly. Unlike metal bellows, which still require O-rings for sealing, here the PTFE bellows is the only sealing element that hermetically seals the valve interior from the environment without a dome or dead space (one-piece seal in product contact).<\/p>\n","technical_data":"\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Material<\/strong><\/td>\nin contact with the product
optional
not in contact with the product<\/td>\n		1.4404\/AISI316L
1.4435\/AISI316L
1.4301\/AISI304<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Seals<\/strong><\/td>\nTeflon bellows
Metal bellows
O-rings\/seals<\/td>\n		PTFE
1.4571\/1.4404
EPDM<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Temperatures<\/strong><\/td>\nmaximum<\/td>\nEPDM<\/td>\nPTFE<\/td>\n<\/tr>\n
<\/td>\nContinuous operating temperature<\/p>\n

Sterilization temperature<\/td>\n

130 \u00b0C*<\/p>\n

150 \u00b0C*<\/td>\n

121 \u00b0C*<\/p>\n

135 \u00b0C* for a short time
(approx. 20 min)<\/td>\n<\/tr>\n

<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Press<\/strong><\/td>\nClosing pressure
Type pipe
Type tank<\/p>\n

Control air pressure<\/td>\n

max. 6 bar in the pipe
max. 4 bar in tank min. 6 bar -
max. 10 bar<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Surfaces<\/strong><\/td>\nin contact with the product
optional<\/p>\n

not in contact with the product<\/td>\n

Ra \u2264 0.8 \u00b5m
e-polished, other surfaces on request
Ra \u2264 1.6 \u00b5m<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Connections
Standard-
Pipe classes<\/strong><\/td>\n		DIN 11850-R2 (DIN 11866 A)
O.D.-Tube (DIN 11866 C)
DIN EN ISO 1127 (DIN 11866-B)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/p>\n

*dependent on operating parameters<\/div>\n","benefits":"\n\n\n\n\n\n\n
Structure of the valve<\/b><\/td>\nSolid valve body<\/p>\n

No dead spaces<\/p>\n

completely idle<\/p>\n

Many installation positions possible<\/td>\n<\/tr>\n

Absolute product protection<\/b><\/td>\nComplete separation from the environment<\/p>\n

no sump, no dome<\/td>\n<\/tr>\n

Service friendliness <\/b><\/td>\nGasket replacement without special tools<\/p>\n

Short downtimes<\/p>\n

Screwed bellows<\/p>\n

Optimal to clean<\/td>\n<\/tr>\n

Economic efficiency <\/b><\/td>\nLong service life of the PTFE bellows<\/p>\n

Standard gaskets<\/p>\n

Minimal maintenance costs<\/td>\n<\/tr>\n

Additional certificates<\/b><\/td>\nAvailable in 3-A version or with TA-Luft certificate
(bottom seat valve)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","electronic_feedback":"

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The control head from Rieger was developed in collaboration between AWH and Rieger together with B\u00fcrkert.
Rieger thus offers you a tailor-made solution for your in-house hygienic and aseptic process valves, enabling them to be used even more efficiently and accurately.<\/b><\/p>\n

NON-CONTACT INDUCTIVE VALVE POSITION DETECTION (TEACH FUNCTION)<\/b><\/p>\n