Earthquake Actuated Automatic Gas Shutoff System (Gura-Pita)
Earthquake Actuated Automatic Gas Shutoff System (Gura-Pita)
G-250 · G-400
G-250 G-400
Compatible Shutoff Valve MV 25, MV 25F, MV 40F, HV 25F
Basic Configuration and Functions Operations Method Vertical magneto (Mechanical)
Method of Mounting Ground fixing (With outer case)
Connection of Release M12 x 1 Female screwed
Indication Green: Normal, Red: Sensed an earthquake
Reset Method By turning the handle
Output Horizontal push: 1 kg; Output length: 4 mm or mo
Dimensions Body:129(W) × 143(H) × 95(D)
Case :183(W)× 381(H) × 133(D)
Sensor Sensitivity 200 – 250 GAL
(Equivalent to magnitude 5)
320 – 400 GAL
(Equivalent to magnitude 6)
Working Test Manual by turning the handle
Accuracy Checking cInclination angle
Main materials Body ASA Plastic
sensor Rare-earth metal
Sensor Holder BSBM
Hanging Plate
Outer Case SPCC SS330
Remarks Weather Resistance Simplified drip-proof structure
Working Temperature – 10 – 40 ℃
Working Humidity 90% RH or less
Price

Drawings CAD Maunal Product picture
G-250
G-400
Shutoff Valve Specialized for Earthquake
Shutoff Valve Specialized for Earthquake
MV‐Type (Medium Pressure) HV‐Type (High Pressure)

 

MV-15 MV-20FR
MV-20FL
MV-25 MV-25FR
MV-25FL
MV-40F HV-25F
Compatible Earthquake Sensor G-250  G-400
Basic Configuration and Functions Operations Method Magnetic lever (Mechanical)
Connections Rc½(Female screwed) JIS 20 K 25 A Flanged Rc1(Female screwed) JIS 20 K 25 A Flanged JIS 20 K 40 A Flanged JIS 20 K 25 A Flanged
Flow Rate 30 kg/h 70 kg/h 70 kg/h 100 kg/h 200 kg/h 100 kg/h
Face to Face Dimension 90 mm 208 mm 90 mm 170 mm 200 mm 170 mm
Connection of Release M12×1 Female screwed
Indication Colorless: Opened, Red: Closed
Normal open (Contact Capacity : DC30 V 3 A)
Reset Methods By pulling up the handle after resetting earthquake sensor
Max. Working Pressure 0.2 MPa 1.56 MPa
Input Horizontal push: 300 g
Input length: 3 mm or more
Working Test Manual by operating the sensor
Main Materials Body Ductile cast iron (Spheroidal graphite cast Iron)
Housing Aluminum alloy die casting
Notes Weather Resistance Simplified drip-proof structure
Working Temperature -10 – 40℃
Working Humidity 90% RH or less

Drawings CAD Performance curve Maunal Product picture
MV-15
MV-20FR
MV-20FL
MV-25
MV-25FR
MV-25FL
MV-40F
HV-25F

Release
Release

Model No. REL-10 REL-18
Length 1,000 mm 1,800 mm
Connections M12 × 1 Male screwed
Installation Methods Linear distance between trembler breaker and release connector 1,300 mm
or less for G-250 and G-400
Price

Note 1: When bending the release, make sure the radius of curve is 150 mm or more.
Note 2: Sold separately.

Drawings CAD Performance curve Maunal Product picture
REL-10
REL-18

※各ファイルは右クリック「名前をつけて保存」からダウンロードして下さい

Operating principle of Gurapita
Operating principle of Gurapita
●When Shutoff Valve is Open (Standby State)
When the valve is open, the adsorption board has been adsorbed to the permanent magnet in the shutoff valve.
The shutoff valve keeps its opened condition by an inside permanent magnet and secure the detector by magnet inside sensor.
g_img01

●When Earthquakes Occurs
When earthquake sensor senses over a level 5 earthquake, the sensor separates from the magnet and push down the pointed end of the release. (The release is put a cable through a flexible pipe and fitted with hard axis of the metal at both ends of the pipe. When one end of the metal is pressed, the other end is pushed down and comes out the cable under stress of physical force.) With pressing the end of the release of sensor side, the end of the release of shutoff valve side comes out, and press the lever inside of the shutoff valve.
Expanding the force from the release and pull the adsorption board away from the permanent magnet, the lever close the valve by force of the actuating spring.
g_img02
Earthquake Actuated Automatic Gas Shutoff System (Gura-Pita) Example of Installation
Example of Installation (Note: Bypass piping is recommended for maintenance.)
●High-Pressure Bypass Method●
g_img03
●Low-Pressure W Method●
g_img04
●Bulk Supply System●
g_img05
Note: When earthquake sensor senses over the setting level (3 types; see the specifications), sensor activates a shutoff valve automatically by force of pushing down the operating shaft through the release.
●30-Unit Manifold●
30本立て集合装置
●Bulk Supply●
バルク供給設備