High quality globe valves provided by JQF Valve, a professional valves manufacturer in China. We use precision manufacturing technology and high-quality materials, applied to petroleum, chemical, electric power, pharmaceutical, water treatment and other industries, in high, medium and low pressure conditions to provide stable opening and closing and flow regulation.
1. Precision Zero-Leakage Seal: The globe valve's conical valve disc and matching metal seat are precision ground to a surface roughness Ra ≤ 0.4 μm, ensuring an airtight seal that meets API 598 Class VI and ANSI B16.34 leakage standards. The seal maintains integrity in steam systems, crude oil pipelines, and acidic media.
2. Linear Throttling Control Capability: The durable globe valves' parallel valve disc design allows for direct stem-driven regulation. Unlike rotary valves, this design eliminates the impact of high-speed fluid on the valve seat during throttling operations. According to ISO 5208 Class V abrasive flow test, seal wear is reduced by 78%.
3. Certified Extreme Condition Performance
The forged ASTM A105 or cast ASTM A216 WCB valve body can withstand pressures from PN16 to PN420. Constructed from corrosion-resistant CF8M duplex stainless steel, it can withstand thermal cycling from -196°C to 600°C according to ANSI B16.34 standards.
4. Maintenance-Optimized Design
The 17-4PH precipitation-hardened stem combined with a molded flexible graphite packing assembly has been tested to ISO 15848-1 emission standards, with over 200,000 mechanical cycles. A self-lubricating PTFE support ring ensures continuous operation for over 5 years without the need for stuffing box adjustments.
5. Application-Specific Flow Geometry
T-Type: Provides an ANSI Class VI compliant shut-off valve in straight pipe sections, with a Cv value 30% lower than the industry average.
Angled Type: Allows fluid to be diverted by 90°, resulting in a 42% reduction in pressure drop compared to conventional designs. Y-type: A 55° seat angle minimizes turbulence formation in corrosive media with velocities exceeding 25 m/s.
6. Rated Load Drive System: Manual operation utilizes a double-ended trapezoidal thread with a mechanical advantage of 20:1. The automatic version includes an ATEX/IECEx certified pneumatic actuator and an IEC 60529 IP68 submersible motor for remote positioning. The emergency shut-off device complies with IEC 61508 SIL 2 requirements.
Oil & Gas: Pipelines, refineries.
Chemical & Pharma: Corrosive fluid control.
Power Plants: Boiler feedwater, steam systems.
Water Treatment: Municipal supply, wastewater.
1. Advanced globe valves operated by handwheels or handles can be installed anywhere on the pipeline.
2. Handwheels, handles, and micro-motion mechanisms are not permitted for lifting purposes.
3. The flow direction of the medium should be consistent with the arrow direction shown on the valve body.
