Can the Stainless Steel Manometric Reduction Nipple, Type RDN self-seal without additional sealing materials when mounting a standard EN 837-1 pressure gauge?

Yes. The Stainless Steel Manometric Reduction Nipple, Type RDN Format features an internal conical geometry at the bottom of hole d1 that presses into the centering hole of a standard EN 837-1 pressure gauge connection, creating a self-sealing joint. This design ensures tightness without additional sealing materials. Additionally, both threads (d1 and d2) are reinforced with a special adhesive to prevent loosening and maintain long-term stability and safety.

How does the Stainless Steel Manometric Reduction Nipple, Type RDN ensure long-term thread stability under vibration and thermal cycling?

The Stainless Steel Manometric Reduction Nipple, Type RDN ensures long-term thread stability under vibration and thermal cycling through several integrated features. Both internal (d1) and external (d2) threads are reinforced with a special adhesive that bonds the mating surfaces, preventing back-off and maintaining preload despite vibratory loads or cyclic temperature changes. The nipple’s conical self-sealing design at the bottom of hole d1 creates a mechanically secure, interference-fit seal with the gauge centering hole, reducing micro-movements that can lead to thread wear. Construction from AISI 316Ti stainless steel provides dimensional stability and resilience to thermal expansion and corrosion, minimizing relaxation and material degradation over time. Together, adhesive reinforcement, precise conical seating and high-grade material deliver reliable, long-term thread integrity in demanding, vibration- and thermal-cycling environments.

Stainless Steel Manometric Reduction Nipple, Type RDN

All products, Manometers reducers and valves/

Additional information

Material	SS – stainless steel

The internal and external threaded nipple is a reliable solution for mounting pressure gauges with a standard connection in compliance with EN 837-1, ensuring secure and precise installation even in demanding applications. Designed to enable the attachment of a pressure gauge to a larger socket, it features an internal thread d1 where the gauge is mounted. The innovative self-sealing mechanism, achieved through the conical design at the bottom of hole d1 pressing into the centering hole of the gauge connection, guarantees tightness without the need for additional sealing materials. Both threads d1 and d2 are reinforced with a special adhesive to prevent loosening, providing long-term stability and safety of use. Manufactured from high-quality AISI 316Ti stainless steel, the nipple offers excellent resistance to corrosion and durability, making it suitable for continuous operation with non-aggressive liquids and gases. Its versatility allows for the installation not only of pressure gauges but also taps, pressure valves, and other compatible accessories, making it an indispensable component in industrial systems where reliability, precision, and safety are essential.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
FM-RDN-04B-06N-SS	Reduction manifold 1/4" BSP / 3/8" NPT, AISI 316Ti	-	-	In stock	Enquiry
FM-RDN-04B-08B-SS	Reduction manifold 1/4" BSP / 1/2" BSP, AISI 316Ti	-	-	In stock	Enquiry
FM-RDN-04B-08N-SS	Reduction manifold 1/4" BSP / 1/2" NPT, AISI 316Ti	-	-	In stock	Enquiry

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The internal and external threaded nipple is a reliable solution for mounting pressure gauges with a standard connection in compliance with EN 837-1, ensuring secure and precise installation even in demanding applications. Designed to enable the attachment of a pressure gauge to a larger socket, it features an internal thread d1 where the gauge is mounted. The innovative self-sealing mechanism, achieved through the conical design at the bottom of hole d1 pressing into the centering hole of the gauge connection, guarantees tightness without the need for additional sealing materials. Both threads d1 and d2 are reinforced with a special adhesive to prevent loosening, providing long-term stability and safety of use. Manufactured from high-quality AISI 316Ti stainless steel, the nipple offers excellent resistance to corrosion and durability, making it suitable for continuous operation with non-aggressive liquids and gases. Its versatility allows for the installation not only of pressure gauges but also taps, pressure valves, and other compatible accessories, making it an indispensable component in industrial systems where reliability, precision, and safety are essential.