Can the Manometric reduction nipple, brass, type RDN be used with aggressive media or only for non-aggressive liquids and gases?

The Manometric reduction nipple, brass, type RDN is specified as designed for non-aggressive liquids and gases. Made of brass and featuring a self-sealing cone connection, it is intended for installation of pressure gauges, taps, and pressure valves where the media are non-corrosive. Brass can be attacked by certain aggressive media (strong acids, halides, ammonia, some sour gases and chloride-containing environments), so the RDN should not be used with aggressive chemicals unless compatibility is confirmed by materials testing or manufacturer approval. For aggressive media, select a nipple made of a corrosion-resistant material (e.g., stainless steel or a chemically resistant alloy) or consult the manufacturer for a suitable alternative.

Is the Manometric reduction nipple, brass, type RDN suitable for use with aggressive media or only non-aggressive liquids and gases?

Manometric reduction nipple, brass, type RDN is designed for non-aggressive liquids and gases. Made of brass with a self-sealing EN 837-1 pressure connection and adhesive-secured threads, it is intended for installation of pressure gauges, taps, valves and similar accessories. It is not specified for use with aggressive media.

Does the Manometric reduction nipple, brass, type RDN require special sealing for aggressive media?

No. The Manometric reduction nipple, brass, type RDN does not require additional special sealing for standard use because its internal thread d1 is designed to be self-sealing: the cone at the bottom of hole d1 presses into the centering plug of the pressure gauge connection to form the seal. However, note these important limitations: the product is specified for nonâaggressive liquids and gases only, and threads d1 and d2 are fixed with a special adhesive to prevent loosening. For aggressive media, brass may be chemically attacked and the standard selfâsealing cone/plug interface or adhesive may fail; therefore special sealing materials, corrosionâresistant materials, or alternative fittings rated for aggressive media should be used. If you plan to use aggressive media, consult the manufacturer or choose a nipple/fitting and sealing method specifically certified for that media.

Manometric reduction nipple, brass, type RDN

All products, Manometers, reducers, and valves/

Additional information

Material	B – brass (bronze)
Standard length [m]	10

Internal and external threaded nipple for pressure gauges with standard pressure connection according to EN 837-1. Allows the installation of a pressure gauge to a larger size socket. The pressure gauge is mounted to the internal thread d1. This connection is self-sealing – the cone at the bottom of the hole d1 presses into the hole of the centering plug of the pressure gauge connection. Threads d1 and d2 are secured against loosening of the connection by a special adhesive. Designed for non-aggressive liquids and gases, for the installation of pressure gauges, taps, and pressure valves, as well as other accessories equipped with this type of connection. Material: brass.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
FM-RDN-04B-06B	Reduction manifold 1/4" BSP / 3/8" BSP, brass	-	-	In stock	Enquiry
FM-RDN-04B-06N	Reduction manifold 1/4" BSP / 3/8" NPT, brass	-	-	In stock	Enquiry
FM-RDN-04B-08B	Reduction manifold 1/4" BSP / 1/2" BSP, brass	-	-	In stock	Enquiry
FM-RDN-04B-08N	Reduction manifold 1/4" BSP / 1/2" NPT, brass	-	-	In stock	Enquiry
FM-RDN-04B-M20	Reduction manifold 1/4" BSP / GZ M20x1.5, brass	-	-	In stock	Enquiry

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Internal and external threaded nipple for pressure gauges with standard pressure connection according to EN 837-1. Allows the installation of a pressure gauge to a larger size socket. The pressure gauge is mounted to the internal thread d1. This connection is self-sealing – the cone at the bottom of the hole d1 presses into the hole of the centering plug of the pressure gauge connection. Threads d1 and d2 are secured against loosening of the connection by a special adhesive. Designed for non-aggressive liquids and gases, for the installation of pressure gauges, taps, and pressure valves, as well as other accessories equipped with this type of connection. Material: brass.