Japanese standard gate valve

Japanese standard gate valveJapanese Standard Gate Valve is a gate valve designed and manufactured according to Japanese Industrial Standards (JIS), widely used in industries such as petroleum, chemical, and power. The following is a detailed introduction about Japanese standard gate valves:

1. Standards and specifications

JIS standards: Japanese industrial standards such as JIS B2073 (cast iron gate valves) and JIS B2074 (cast steel gate valves).

JPI standard: Japanese Petroleum Institute standard, such as JPI 7S-43 (steel gate valve).

ISO standards: International Organization for Standardization standards, such as ISO 5208 (Valve Pressure Test).

2. Structural composition

Valve body: usually made of cast iron, cast steel, stainless steel or alloy steel, resistant to high pressure and corrosion.

Valve cover: connected to the valve body, usually bolted.

Gate plate: It cooperates with the valve seat to control the flow of the medium.

Valve stem: connects the handwheel or actuator to transmit operating force.

Seat: Cooperate with the gate to ensure sealing.

Handwheel or actuator: Manually or automatically operate valves.

3. Working principle

By rotating the handwheel or driving the actuator, the valve stem drives the gate to move up and down.

When the gate contacts the valve seat, the valve closes, blocking the flow of the medium.

When the gate leaves the valve seat, the valve opens and the medium passes through.

4. Characteristics

Good sealing performance: The gate and valve seat are tightly matched to ensure sealing.

Small flow resistance: When fully open, the flow resistance is small, suitable for high flow situations.

High pressure and high temperature resistance: suitable for high pressure and high temperature working conditions.

Multiple driving modes: manual, electric, pneumatic, etc.

5. Application Fields

Petrochemical industry: used for controlling oil, gas, and chemicals.

Electricity: used for boiler systems and cooling water systems.

Water treatment: used for water supply and drainage, sewage treatment.

Food and medicine: used for fluid control with high hygiene requirements.

6. Key selection points

Medium characteristics: Consider the corrosiveness, temperature, and pressure of the medium.

Valve size: Choose according to the pipeline size.

Pressure level: Select based on system pressure.

Drive mode: Choose manual, electric, or pneumatic according to operational requirements.

7. Maintenance and upkeep

Regular inspection: Check the seals and valve stem to ensure there are no leaks.

Cleaning and maintenance: Regularly clean the valve to prevent impurities from affecting the seal.

Lubrication: Regularly lubricate moving parts to reduce wear and tear.

8. Common faults and their solutions

Leakage: Check the seals and replace them if necessary.

Difficulty in operation: Check the valve stem and gate, lubricate or replace if necessary.

Valve stuck: Check for impurities or damage, clean or replace if necessary.

summary

Japanese standard gate valveDue to its excellent sealing performance, low flow resistance, and high pressure and high temperature resistance, it is widely used in multiple industries. Proper selection, installation, and maintenance are key to ensuring its long-term stable operation.