Manufacturer: Daiichi Keiki
Model: PK Series

Overview

A diaphragm-type pressure gauge integrates a diaphragm device directly connected to the pressure receiving part, with liquid sealed inside under vacuum.

Structure

The measurement fluid does not come into direct contact with the pressure area and the Bourdon tube, as they are separated by a diaphragm. A suitable liquid is enclosed to smoothly transmit the pressure applied to the diaphragm to the pressure gauge. The diaphragm is a simple plate-like shape, and various materials can be selected to match the measurement fluid.

Application

It is widely used for measuring fluids that include highly corrosive fluids, high viscosity liquids, and solids, such as in the petroleum, paper, and chemical industries.

Standard Flange Dimension Table

JIS Flange Dimension Table

(Unit: mm)

Model number	PK-6　Single flange standard model
		Size		75φ 100φ
		Diaphragm diameter		38.5φ		52φ
		Flange diameter		JIS10k-15A~ JIS10k-25A		JIS10k-40A or higher
		Pressure span (MPa)		Pressure	(0~1)~(0~4)	(0~0.25)~ (0~4)
		Material	Upper flange	SUS304
			Diaphragm	SUS316L
			Lower flange	SUS304 Monel SUS316 Hastelloy C SUS316L Titanium
Filled liquid	Silicon Propylene Glycerin High temperature silicone Daifroil Pure water
Case material	Resin screw lid case		Gasket	Teflon
Accuracy	±1.6% FS / Temperature 20℃±10℃		Tightening bolt	–

Model number	PK-6F　 Single flange diaphragm welding model
			Size		75φ 100φ
			Diaphragm diameter		62φ		76φ
			Flange diameter		JIS10k-40A or higher		JIS10k-50A or higher
			Pressure span (MPa)		Pressure	(0~0.25)~ (0~6)	(0~0.4)~ (0~4)
					Vacuum	–	-0.1～0
					Coupled	–	(-0.1~0.1)~ (-0.1~2.5)
			Material	Upper flange	S25C (Cr plating)　　　SUS304
				Diaphragm	SUS316L Teflon Titanium Monel Tantalum Hastelloy EP rubber SUS316L+Teflon coating
				Lower flange	SUS304 Monel SUS316 Hastelloy C SUS316L Titanium
Filled liquid	Silicon Propylene Glycerin High temperature silicone Daifroil Pure water
Case material	Resin screw lid case			Gasket	Teflon
Accuracy	±1.6% FS / Temperature 20℃±10℃			Tightening bolt	SUS304

Model number	PK-8F　 Lower flange resin model
			Size		75φ 100φ
			Diaphragm diameter		/	60φ	76φ
			Flange diameter		Compatible with all flange diameters
			Pressure span (MPa)		Pressure	(0~0.25)~ (0~1)	(0~0.04)~ (0~1)
					Vacuum	–	-0.1～0
					Coupled	(-0.1~0.2)~ (-0.1~1)	(-0.1~0.1)~ (-0.1~1)
			Material	Upper flange	S25C (Cr plating)　　SUS304 PVC
				Diaphragm	Teflon Tantalum SUS316L+Teflon coating SUS316L+rubber lining EP rubber
				Lower flange	PVC (up to 60℃) HT-PVC (up to 80℃) PP (up to 100℃) Teflon
Filled liquid	Silicon Propylene Glycerin High temperature silicone Daifroil Pure water
Case material	Resin screw lid case			Gasket	Teflon
Accuracy	±1.6% FS / Temperature 20℃±10℃			Tightening bolt	SUS304

Model number	PK-9F　Diaphragm welding model
			Size		75φ 100φ
			Diaphragm diameter		76φ
			Flange diameter		Compatible with all flange diameters
			Pressure span (MPa)		Pressure	(0~0.04)~(0~6)
					Vacuum	-0.1～0
					Coupled	(-0.1~0.1)~(-0.1~2.5)
			Material	Upper flange	S25C (Cr plating)　　　SUS304
				Diaphragm	SUS316L Titanium Monel Hastelloy C Tantalum EP rubber SUS316L+Teflon coating
				Lower flange	SUS316 SUS304 SUS316L Titanium Monel Hastelloy C SUS+Teflon coating SS+glass lining SUS+Teflon lining
Filled liquid	Silicon Propylene Glycerin High temperature silicone Daifroil Pure water
Case material	Resin screw lid case			Gasket	Teflon
Accuracy	±1.6% FS / Temperature 20℃±10℃			Tightening bolt	SUS304

Dimensions

Due to improvements to this product, specifications may change without prior notice.