The D250 is a high pressure valve intended to be installed on leture bottles filled with various specialty gases. Mostly used in calibration applications.
Conoflow - Diaphragm Seals
509229-1 822419-2 HUMIDIFIER Bottle Valve Cap Compatible with Emerson ESSICK Kenmore MOISTAIR : Appliances
Constant Flow Cylinder Valve - D405
Brass cylinder inline RPV valve for High Purity gases - D283
Mudder 509229-1 822419-2 Humidifier Bottle Valve Cap Valve Caps for Humidifier Compatible with Kenmore Moistair Emerson Essick Fits for 758144071 758144170 758144070 758154200 758144150 (2) : Appliances
Simrit_Catalog_2007_Special_Sealing_Products
HQRP 2-pack Bottle Cap Valve Assembly Replacement for Essick Air 509229-1 822419-2, compatible with Emerson MoistAir Kenmore Humidifiers : Appliances
DF50 Flush Type Flanged Diaphragm Seal
Mudder 509229-1 822419-2 Humidifier Bottle Valve Cap Valve Caps for Humidifier Compatible with Kenmore Moistair Emerson Essick Fits for 758144071 758144170 758144070 758154200 758144150 (2) : Appliances
Diaphragm seal lecture bottle valve - D250
Diaphragm & Annular Seal Assembly & Fill
Diaphragm, ATLANTIS, Diaphragm Seal, Homogenizer, Diaphragm Seal for Homogenizer (Flush Diaphragm Type) - DS350 - Product - Gauge
Screwed diaphragm seals STT - MERCON