Daiichi Keiki, Japan
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 | Dφ | 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 | |
gφ | 51 | 56 | 67 | 81 | 96 | 51 | 56 | 67 | 55 | 60 | 70 | |
Bolt diameter | cφ | 70 | 75 | 90 | 105 | 120 | 70 | 75 | 90 | 80 | 85 | 95 |
Number | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | |
hφ | 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 1/2 B | 2B | 1 / 2B | 3 / 4B | 1B | |
Flange dimensions | Dφ | 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 | |
gφ | 55 | 60 | 70 | 34.9 | 42.9 | 50.8 | 73 | 92.1 | 34.9 | 42.9 | 50.8 | |
Bolt diameter | cφ | 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 | |
hφ | 19 | 23 | 23 | 16 | 16 | 16 | 16 | 20 | 16 | 20 | 20 |
Model number | PK-5 Flange type standard model | |||||||||||||||||
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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 |
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Lower flange |
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Filled liquid |
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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 |
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Pressure span (MPa) |
Pressure | (0~1)~(0~4) | (0~0.25)~ (0~4) |
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Material | Upper flange | SUS304 | |||||||||
Diaphragm | SUS316L | ||||||||||
Lower flange |
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Filled liquid |
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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 |
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Pressure span (MPa) |
Pressure | (0~0.25)~ (0~6) |
(0~0.4)~ (0~4) |
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Vacuum | – | -0.1~0 | |||||||||||||
Coupled | – | (-0.1~0.1)~ (-0.1~2.5) |
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Material | Upper flange | S25C (Cr plating) SUS304 | |||||||||||||
Diaphragm |
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Lower flange |
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Filled liquid |
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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) |
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Vacuum | – | -0.1~0 | |||||||||||
Coupled | (-0.1~0.2)~ (-0.1~1) |
(-0.1~0.1)~ (-0.1~1) |
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Material | Upper flange | S25C (Cr plating) SUS304 PVC | |||||||||||
Diaphragm |
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Lower flange |
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Filled liquid |
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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 |
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Lower flange |
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Filled liquid |
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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 | |
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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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