Marine Liquefied Petroleum Gas Safety Valve CB/T4381-2014

Safety Valve

A safety valve is a protective valve whose closing element remains normally closed under external force. It automatically opens when the medium pressure inside equipment or pipelines exceeds the specified value, discharging medium externally to prevent pressure from surpassing designated limits. As an automatic valve category, safety valves are primarily used in boilers, pressure vessels, and pipelines to control pressure within safe limits, playing a critical role in personnel safety and equipment operation.

Our company produces the following marine safety valve varieties:

Marine External Thread Bronze Right-Angle Steam Safety Valve CB3192-1993

External Thread Bronze Right-Angle Liquid Safety Valve CB907-1994

External Thread Stainless Steel Air Signal Safety Valve CB3022-1994

Flange Cast Iron Right-Angle Safety Valve CB304-92 CBM1038-81

Marine JIS Standard Flange Cast Iron Right-Angle Safety Valve CBM1038-81

Marine Twin Boiler Steam Safety Valve CB311-81 A38Y-16C

Marine Boiler Safety Valve 5812 Q44

External Thread Bronze Safety Valve A25W

Safety Return Valve Safety Relief Valve Pressure Release Valve Safety Valve (AHN42F-16/25/40C/P)

A28X-16T Spring Full-Lift Safety Valve (for Air Compressors)

External Thread Steam Bronze Right-Angle Safety Valve CB3192-1993

Working Pressure: 0.1-1.2 MPa (Set pressure adjustable per customer requirements)

Nominal Diameter: DN10-DN15

Applicable Medium: Steam with temperature not exceeding 190°C.

Main Component Materials: Valve body carbon steel, valve seat and disc stainless steel, adjusting ring manganese brass.

External Thread Bronze Right-Angle Liquid Safety Valve CB907-1994

Working Pressure: 0.1-3.2 MPa (Set pressure adjustable per customer requirements)

Nominal Diameter: DN10-DN25

Applicable Medium: Fresh water, seawater, lubricating oil, fuel oil, and pressure vessels

Materials: Valve body ZCuA19AMn2, bonnet and disc QA19-2.

Working Pressure: 0.1-6.5 MPa (Set pressure adjustable per customer requirements)

Applicable Medium: Marine compressed air

Materials: Body 35# steel, valve seat and disc R-type sealing surface rubber, Y-type 2Cr13

Flange Cast Iron Right-Angle Safety Valve CB304-92 DN25-80

Type: B, BS

Nominal Pressure: 0.1-1.6MPa (Set pressure adjustable per customer requirements)

Nominal Diameter: DN25-DN80

Applicable Medium: Seawater, fresh water, and steam with temperature not exceeding 220°C.

Flange Connection Standard: GB2501-89

Main Component Materials: Valve body and bonnet HT200, disc ZCuSn10Zn2, stem Q19-2, spring 60Si2Mn

Flange connection dimensions conform to JIS B2212-1976 and JIS B2213-1976, structural length aligns with JIS F 7334-1976 and JIS F7308-1976, other dimensions comply with CB*304-77

Applicable Medium: Fresh water, seawater, steam with t≤225°C

Working Pressure: 0.1-1.6MPa (Set pressure adjustable per customer requirements)

Flange connection dimensions per CBM1006-81, CBM1007-81

Main Part Materials: Valve body and bonnet gray cast iron, disc and seat cast tin bronze, stem aluminum bronze, spring spring steel

Usage Instructions: 1. Adjust spring to working pressure as per order requirements. Ensure watertightness before reaching working pressure, with non-flowing water droplets permitted at sealing surfaces.

2. Fully open working pressure must not exceed 20% of set pressure, fully closed pressure no lower than 90% of working pressure.

3. For working pressure P≤0.25MPa, fully closed pressure may be 0.05MPa lower than working pressure. After testing, the manufacturer loosens the adjusting sleeve to restore spring to free state.

Nominal Pressure: 1.6-4.0MPa

Nominal Diameter: DN25-DN150