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Male pipe to Valco internal adapters

Male pipe adapters make a minimum volume connection from the female pipe fittings on pressure gauges and regulators to Valco zero dead volume internal fittings.

Standard material is 300 series stainless. Also available in Hastelloy C and titanium. Read about properties of metals.

Tech tips

Limitations of pipe fittings
Determining thread size

Further reference

Female pipe to Valco internal adapters
Male pipe to Valco external adapters
Male pipe to Valco external adapters

Our manifold pipe adapters allow you to connect one or two pipe fittings to three Valco zero dead volume fittings.

Fitting size	Bore	Product No.
1/8" NPT male to:
1/16" ZDV fitting	1.0 mm	PZA21
1/16" ZDV fitting	1/16"	PZA21T
1/8" ZDV fitting	1.0 mm	PZA22
1/4" NPT male to:
1/16" ZDV fitting	1.0 mm	PZA41
1/8" ZDV fitting	1.0 mm	PZA42
1/8" ZDV fitting	2.0 mm	PZA42L
1/4" ZDV fitting	4.6 mm	PZA44L
1/2" NPT male to:
1/16" ZDV fitting	1.0 mm	PZA81
1/8" ZDV fitting	1.0 mm	PZA82
1/8" ZDV fitting	2.0 mm	PZA82L
1/4" ZDV fitting	4.6 mm	PZA84L

Tech tip: Limitations of pipe fittings

Because of their dead volume and the risk of thread leaks, pipe fittings are a poor choice for trace gas analysis. Thread sealants, particularly PTFE tape, cannot boost their performance to adequate levels. For trace gas applications, choose Valco zero dead volume fittings with gold-plated stainless ferrules.

Tech tip: Determining thread size

NPT, National Pipe Thread, is a standard developed a long time ago by people without rulers. 1/8" NPT is nowhere close to 1/8"! To determine the thread size of a pipe fitting, measure the diameter of the fitting across the narrow end, and/or count the number of threads in a 1" section, then consult this illustration.