Safety Valve

A safety valve is a protective valve whose opening and closing element is normally closed under external force. When the medium pressure inside the equipment or pipeline rises and exceeds the specified value, it automatically opens to discharge the medium outside the system, preventing the pressure from exceeding the specified limit. Safety valves belong to the category of automatic valves and are primarily used in boilers, pressure vessels, and pipelines to control pressure within the specified range, playing a critical role in ensuring personal safety and equipment operation.

The types of marine safety valves produced by our company include:

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

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

Marine JIS Standard Flanged 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 Reflux 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 can be adjusted according to customer requirements)

Nominal Diameter: DN10-DN15

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

Material Description of Main Components: Valve body made of carbon steel, valve seat and valve disc made of stainless steel, adjusting ring made of manganese brass.

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

Working Pressure: 0.1-3.2 MPa (set pressure can be adjusted according to customer requirements)

Nominal Diameter: DN10-DN25

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

Materials: Valve body made of ZCuA19AMn2, valve cover and valve disc made of QA19-2.

Working Pressure: 0.1-6.5 MPa (set pressure can be adjusted according to customer requirements)

Applicable Medium: Ship compressed air

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

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

Type: B, BS

Nominal Pressure: 0.1-1.6 MPa (set pressure can be adjusted according to customer requirements)

Nominal Diameter: DN25-DN80

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

Flange Connection Standard: GB2501-89

Materials of Main Components: Valve body and valve cover made of HT200, valve disc made of ZCuSn10Zn2, valve stem made of Q19-2, spring made of 60Si2Mn

The flange connection dimensions of this standard are consistent with JIS B2212-1976 and JIS B2213-1976, the structural length is consistent with JIS F 7334-1976 and JIS F7308-1976, and other dimensions comply with CB*304-77

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

Working Pressure: 0.1-1.6 MPa (set pressure can be adjusted according to customer requirements)

Flange Connection Dimensions: According to CBM1006-81, CBM1007-81

Materials of Main Parts: Valve body and valve cover made of gray cast iron, valve disc and valve seat made of cast tin bronze, valve stem made of aluminum bronze, spring made of spring steel

Usage Instructions: 1. Adjust the spring to the working pressure as per order requirements. Before reaching the working pressure, watertightness must be ensured, but non-flowing water droplets at the sealing surface joint are allowed.

2. The working pressure at which the safety valve fully opens shall not exceed 20% of the set pressure, and the pressure at which the safety valve fully closes shall not be lower than 90% of the set pressure.

3. When the working pressure P≤0.25 MPa, the pressure at which the safety valve fully closes may be 0.05 MPa lower than the set pressure. After testing, the manufacturer will loosen the adjusting sleeve to restore the spring to its free state.

Nominal Pressure: 1.6-4.0 MPa

Nominal Diameter: DN25-DN150