Overpressure relief series

Overpressure Relief

The overpressure relief series products include bursting discs, safety valves, bending pin valves, etc. Each of the three has its own characteristics. Appropriate equipment can be selected according to actual working conditions and used alone or in combination to achieve the effect of protecting system equipment.

1612 YJ Series Holder

Compatible only with forward-acting rupture disks
Size range: 1"-12"
Standard Material: Carbon Steel, 316SS (other materials available upon request)
Recessed holder design: Allows pre-assembly in workshop, protecting the disk during pipeline disassembly
Dome shielded inside holder: Prevents damage during flange installation
Tool-free disassembly for easy maintenance
Nameplate includes holder specs and flow direction indicator
1620 Pre-Torqued Holder（P-YJ，P-LJ）

Self centering installation: The external design of the holder is coordinated with the flange bolts to automatically position the holder component at the center of the flange.
Line-surface sealing: Using metal line surface sealing to increase the sealing ability between the bursting disk and the holder, preventing medium leakage problems.
Compatible with multiple flanges: Standard sizes can be adapted to HG Chemical Department, ANSI American Standard, JIS Japan and other standard flanges.
Easy installation: PS-YJ/PS-LJ type holder to assemble the bursting disk with the clamp in advance, and only install it between the flanges on site, avoiding on-site installation and damage to the bursting disk. The installation steps and later replacement are more convenient.
1630 Burst Sensor / BI series

Size range: 1"-24"
Instant alarm activation minimizes downtime.
Compatible with metal/graphite Burst Disk or safety valves in series.
Direct installation in standard pipelines—no holder required.
Low operating cost.
1640 Tell-tale Accessory

Zero backpressure maintained when rupture disc is intact (vented to atmosphere)
Relief valve closes automatically upon disc activation
Outlet can be piped to recovery tank
4100 Series Small-Sized Pressure Relief Valve

Applicable media: gases, water vapor, and liquids, etc.
Size range:1/2"× 1" to 2 "× 2–1/2".
Pressure range: 0.1 MPa (g) to 42 MPa (g).
Temperature range: -196 to 200°C.
Materials: carbon steel, stainless steel, copper, Monel alloy, etc.
Optionally available: wrench, flange joint, welded joint, Test stem:
Safety valve on-line inspection.
4200 Series Conventional Pressure Relief Valve

Applicable media: gas, steam, liquid, etc.
Size range: 1" × 2" to 8" × 10".
Pressure range: 0.1 MPa (g) to 42 MPa (g).
Temperature range: -196 to 540°C.
Materials: carbon steel, stainless steel, copper, Monel alloy, etc.
Optional accessories: handle, bellows, radiator, Test Stem, Online Inspection of Safety Valve, Thermal Insulation.
4500 Series Pilot-Actuated Pressure Relief Valve

Applicable media: gases, liquids, etc.
Size range: 1" × 2" to 8" × 10".
Pressure range: 0.1 MPa (g) to 42 MPa (g).
Temperature range: -196 to 260°C.
Materials: carbon steel, stainless steel, copper, Monel alloy, etc.
Optionally: test rod, online safety valve inspection.
4800 Series Open-End Structural Pressure Relief Valve

Applicable media: air, nitrogen, water vapor, etc.
Size range: 1" × 2" to 8" × 10".
Pressure range: 0.1 MPa (g) to 42 MPa (g).
Temperature range: -196 to 540°C.
Materials: carbon steel, stainless steel, copper, Monel alloy, etc.
Optionally available: radiator, test rod, and online safety valve inspection.
9100 Series Angle Pin Valve - 9110/9120

Simple structure, reliable action, good sealing performance. Balanced or unbalanced back pressure structures are available to meet customer requirements.