Product Overview:
The document pertains to the GR-300 Series, specifically models GR-312, GR-312F, GR-314, and GR-314F. These are pressure and flow control devices with various technical specifications outlined.

Valve Operation:
- Valve status when not energized: Closed.

Pressure Control Specifications:
- Pressure control range: from full scale to a certain percentage (exact values not specified).
- Pressure accuracy: ± a certain percentage (exact value not specified).
- Operating temperature range: up to a specified temperature in °C (guaranteed temperature range also specified but values missing).
- Response time: within a few seconds under company equipment conditions.
- Maximum operating pressure and pressure resistance values are indicated but specific numbers are missing.
- External leakage rate: specified as a very low value (exact figure missing).

Pressure Output Signal:
- Output signal range is given as a percentage range (exact values missing).

Power Supply:
- Positive and negative voltage supply with ± percentage tolerance (exact values not provided).

Compliance and Interface:
- The product conforms to certain standards (not specified).
- Digital interface availability is mentioned.

Gas Types and Pressure Ranges:
- Compatible with multiple gas types (names not specified).
- Pressure ranges are indicated but exact values are missing.

Flow Measurement:
- Flow measurement range: from a low percentage to full scale.
- Flow accuracy varies depending on measured flow rate:
• ± certain percentage for flow > specified percentage.
• ± certain percentage for flow ≤ specified percentage.
- Flow output signal range is given as a percentage range (exact values missing).
- Standard fittings correspond to inch sizes.
- Installation orientation: free (no restriction).

Notes:
- Flow accuracy is guaranteed based on calibration gas within the adjusted flow range.
- Specific numerical values for many parameters are missing or redacted in the document.

Locations:
- Sales offices are listed in Tokyo, Tohoku, Nirasaki, Nagoya, and Kyushu Central.
- Address provided for Miyagi Prefecture, Sendai City, Izumi Ward.