Type 25/25H Standard and Elevated Pressure, Non-Replaceable Diaphragm Seals On NOSHOK, Inc.

Designed to isolate the pressure measuring instrument from corrosive or viscous process media
Utilize an all welded, all metallic housing design to eliminate potential leak paths
For use with gauges with dial sizes of 2-1/2" and smaller, and pressure ranges no less than 100 psig
Housing and diaphragm offered in a variety of materials to suit most applications
A flushing port is available to clean wetted areas and prevent process media build up

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Part Number	Description	Instrument Connection Size	Diaphragm Material	Process Connection Size	Pressure [Max] for Transducers

25-02H-H-02H-1F	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-02H-H-02H-1F-P	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-02H-H-02H-2F	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-02H-H-02H-2F-P	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-04H-H-04H	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-04H-H-04H-1F	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-04H-H-04H-1F-P	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-04H-H-04H-2F	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-04H-H-04H-2F-P	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-02H-H-04H	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-02H-H-04H-1F	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-02H-H-04H-1F-P	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-02H-H-04H-2F	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-02H-H-04H-2F-P	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/2" National Pipe Thread (NPT) Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig
25-04H-H-02H	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-04H-H-02H-1F	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-04H-H-02H-1F-P	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-04H-H-02H-2F	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-04H-H-02H-2F-P	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, Hastelloy C-276 Upper and Lower Housing & Diaphragm, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-02S-H-02H	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, 316 Stainless Steel Upper Housing, Hastelloy C-276 Diaphram and Lower Housing, 1/4" National Pipe Thread (NPT) Instrument Connection, Type 25 Diaphragm Seal	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-02S-H-02H-1F	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, 316 Stainless Steel Upper Housing, Hastelloy C-276 Diaphram and Lower Housing, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-02S-H-02H-1F-P	N/A 1/4" National Pipe Thread Instrument Connection, 316 Stainless Steel Upper Housing, Hastelloy C-276 Diaphram & Lower Housing, 1/4" National Pipe Thread Instrument Connection, 1/8" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-02S-H-02H-2F	N/A 1/4" National Pipe Thread (NPT) Instrument Connection, 316 Stainless Steel Upper Housing, Hastelloy C-276 Diaphram and Lower Housing, 1/4" National Pipe Thread (NPT) Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-02S-H-02H-2F-P	N/A 1/4" National Pipe Thread Instrument Connection, 316 Stainless Steel Upper Housing, Hastelloy C-276 Diaphram & Lower Housing, 1/4" National Pipe Thread Instrument Connection, 1/4" NPT Flushing Connection, Type 25 Diaphragm Seal w/ Optional Flush Port	N/A 1/4 in	N/A Hastelloy C-276	N/A 1/4 in	N/A 0 to 2,500 psig
25-04S-H-04H	N/A 1/2" National Pipe Thread (NPT) Instrument Connection, 316 Stainless Steel Upper Housing, Hastelloy C-276 Diaphram and Lower Housing, 1/2" National Pipe Thread (NPT) Instrument Connection, Type 25 Diaphragm Seal, Type 25 Diaphragm Seal	N/A 1/2 in	N/A Hastelloy C-276	N/A 1/2 in	N/A 0 to 2,500 psig

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Process Connection Size

Pressure [Max] for Transducers