1. Product: 400/500 Threaded All-Welded Diaphragm Seal

️· Function: This is a sealing component, likely used in industrial applications (pressure gauges, process instrumentation). It isolates a gauge or instrument from the process being measured.

2. Fill Fluid Options (Table)

This is a crucial element, as the 'fill fluid' is the liquid inside the diaphragm seal. It compensates for pressure and temperature effects. The table provides a vast selection and important details.

Fill Fluid	Temperature Range (°F)	Viscosity (cSt)	Code	Notes/Applications
Syltherm® XLT	-150 to 500	1.4	CC	Low-temperature applications
Glycerin (food grade)	0 to 400	1300	CK	For use with oxygen/oxidizing process media
50 cSt Silicone	-40 to 500	50	CF
Halocarbon® 4.2	-70 to 300	2.9	CT	Direct-mounting only, not for vacuum service
50/50 Ethylene Glycol/Water	-25 to 190	14	CV
Polypropylene Glycol	-50 to 325	30	CZ
Food-grade Silicone	-40 to 500	10	DJ
Distilled Water	40 to 185	0.9	FJ
Ethylene Glycol	20 to 325	14	FK
50/50 Glycerin/Water	15 to 225	30	GH
Polypropylene Glycol	-40 to 500	270	GR
Slytherm® 800	-20 to 600	10	HA	High-temperature applications
Calfo® AF	10 to 400	60	KF	High temperature, silicone-free
Mineral Oil	5 to 400	75	MY	Food Grade
Neobee® M-20	40 to 185	9.5	NM
95/5 Water/Propylene Glycol	40 to 200	1.0	PY

3. Dimensions & Drawings:

️· The text includes specific dimensions for 400 and 500 Threaded Seals. These are:

- 400 Threaded Seal:
■ A: 3.75
■ B: 2.88
■ C: 1.81
(with bracketed measurements in mm: [95] [73] [46])
- 500 Threaded Seal:
■ A: 2.50
■ B: 2.88
■ C: 1.81
(with bracketed measurements in mm: [63] [73] [46])
️· A drawing exists (not provided in text format, but referenced) that shows the gauge socket, seal top housing, and seal bottom housing.

4. General Information

️· The dimensions are provided in inches, with their metric counterparts in brackets.
️· A reference is made to a "temperature/pressure compensation" effect for the fill fluids. This is a critical factor in choosing the right fill fluid for a specific application.