Crosby J-Series Direct Spring Pressure Relief Valve
The Emerson Crosby J-Series valves provide high quality and dependable overpressure protection for air, gas, steam, vapour, liquid and two-phase applications in one simple design. The J-Series Pressure Relief Valve provides overpressure protection from very basic to the most demanding applications. Backed by over 140 years of engineering and application experience, its versatile and rugged design make it a proven solution for oil and gas, process and power industry overpressure protection.
Features
- ASME/NB certified capacities for air, water and steam.
- Full compliance with all major global pressure relief standards including ASME VIII, XIII, API 526/527, EN4126 and PED/CE.
- Highly customizable to meet most applications.
- Interchangeable parts to reduce maintenance costs.
- Full nozzle configuration.
- Simple and reliable design for easy maintenance.
- Soft seat options for superior seat tightness.
- Adjustable blowdown to reduce product loss.
- Restricted Lift available.
- Dual capacity certified to ASME Code Case 2787.
- Balanced Diaphragm technology.
- Available with wired or wireless volumetric emissions monitoring and bellows leak detection.
Specification
Sizes: 1" D 2" to 12" W 16" / 25 D 50 to 200 T 250 (EN Type)
Orifices: 0.110 to 60.75 in2 (71 to 39,193 mm2)
Inlet ratings: ANSI Classes 150, 300, 600, 900, 1500, 2500
EN Classes PN 10, PN 16, PN 25, PN 40
Temperature range: -450 to +1000°F (-268 to +538°C)
Set pressures
JOS-E: 5 to 6000 psig (0.35 to 413.79 barg)
JLTJOS-E: 15 to 6000 psig (1.03 to 413.79 barg)
JBS-E/JBSBP-E: 25 to 6000 psig (1.72 to 413.79 barg)
JLTJBS-E/JLTJBSBP-E: 25 to 6000 psig (1.72 to 413.79 barg)
JDS-E: 25 to 1480 psig (1.72 to 102 barg)
JLTJDS-E: 25 to 1480 psig (1.72 to 102 barg)
Code: ASME Section VIII and Section XIII (15 psig (1.03 barg) and above)
Crosby™ Balanced Diaphragm
- 20% greater back pressure handling improves reliability during back pressure surges.
- 15% improvement in Kb factor enables sizing of smaller and/or fewer valves.
- 100x more resilient than metal bellows for high-frequency cycling, ensuring safety.
- Easily convert existing Crosby J-Series with Balanced Diaphragm upgrade kits
Crosby™ Bellows Leak Detection available
- Instant notification of bellows rupture allows effective maintenance protocol.
- Detection of small ruptures, from 0.0009in2 (D orifice).
- Ensured balanced operation after bellows rupture enhances safety.
- Leakage volumetric calculation in real-time for risk assessment and decision making.
- Over 90% reduction of leakage through bonnet vent.
- Easily enhance existing Crosby J-Series with Bellows Leak Detection upgrade kits.