,

Daiichi Keiki PK Diaphragm-type Pressure Gauge, Flange Type

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)

Nominal pressure JIS 10 kgf/c㎡ JIS 20 kgf/c㎡ JIS 40 kgf/c㎡
Nominal diameter 15A 20A 25A 40A 50A 15A 20A 25A 15A 20A 25A
Flange dimensions 95 100 125 140 155 95 100 125 115 120 130
t 12 14 14 16 16 14 16 16 20 20 22
k 1 1 1 2 2 1 1 1 1 1 1
51 56 67 81 96 51 56 67 55 60 70
Bolt diameter 70 75 90 105 120 70 75 90 80 85 95
Number 4 4 4 4 4 4 4 4 4 4 4
15 15 19 19 19 15 15 19 19 19 19
Nominal pressure JIS 63kgf/cm ANSI 150LB ANSI 300LB
Nominal diameter 15A 20A 25A 1 / 2B 3 / 4B 1B 1/2 B​ 2B 1 / 2B 3 / 4B 1B
Flange dimensions 120 135 140 89 98 108 127 152 95 117 124
t 23 25 27 11.5 13 14.5 17.5 19.5 14.5 16 17.5
k 1 1 1 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6
55 60 70 34.9 42.9 50.8 73 92.1 34.9 42.9 50.8
Bolt diameter 85 95 100 60.3 69.9 79.4 98.4 120.6 66.7 82.5 88.9
Number 4 4 4 4 4 4 4 4 4 4 4
19 23 23 16 16 16 16 20 16 20 20

Model number PK-5  Flange type standard model
 

 

 

 

Size 75φ 100φ
Diaphragm diameter 76φ
Flange diameter Compatible with all flange diameters
Pressure span
(MPa)
Pressure (0~0.04)~(0~4)
Vacuum -0.1~0
Coupled (-0.1~0.1)~(-0.1~2.5)
Material Upper flange  S25C (Cr plating)    SUS304
Diaphragm
Teflon SUS316L
Titanium Monel
Hastelloy C Tantalum
EP rubber
SUS316L+Teflon coating
SUS316L+rubber lining
Lower flange
SUS304 SUS316
SUS316L
Titanium Monel
Hastelloy C
SUS+Teflon coating
SUS+rubber lining
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
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

Type Diaphragm diameter Size
60 75 100
PK-5 76φ PK-5
PK-6 38.5φ 52φ PK-6
PK-6F 62φ PK-6F1
76φ PK-6F2
PK-8F 60φ PK-8F1
76φ PK-8F2
PK-9F 76φ PK-9F

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

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