Client feedback
We installed the Cryo-Seal valves on our LNG unloading line two years ago. Zero fugitive emissions during thermal cycling from -160°C to ambient. The Hastelloy trim held up against chloride stress corrosion where 316L failed within six months.
Cryogenic reliabilityThe Auto-Reg actuator integrated with our DCS in under four hours. Positioning accuracy stayed within 0.4% even with 30 barg supply pressure fluctuations. The failsafe spring-return gave us the safety margin we needed for emergency shutdown scenarios.
Smart actuationChemShield trim sets retrofitted onto our existing 6-inch gate valves. After eight months in 98% H₂SO₄ at 180°C, the tungsten carbide coating showed less than 0.1 mm wear. No galling on the stem threads during quarterly maintenance.
Corrosion resistanceWe specified Fevgroup for a high-pressure gas injection skid. The valves passed the helium leak test at 450 barg with a leakage rate below 10⁻⁶ mbar·L/s. Delivery was on schedule and the technical documentation matched our piping class requirements exactly.
Zero-leakage toleranceThe Auto-Reg actuator’s HART communication simplified our loop check. We calibrated the positioner once and it held setpoint within 0.3% over a 12-month run. The modular design let us swap the pilot valve without removing the actuator from the line.
Easy integrationAfter three years in hydrocracker service at 420°C and 200 barg, the Cryo-Seal valve body showed no hydrogen-induced cracking. The live-loaded packing required only one adjustment. This is the longest maintenance interval we have achieved on a high-pressure letdown valve.
High-temperature durabilityEngineering services and product features that address real constraints in petrochemical and cryogenic pipeline environments.
Wetted components machined from Inconel 625 and Hastelloy C-276 withstand HCl, H₂SO₄, and caustic service up to 400°C without pitting or stress corrosion cracking.
Bubble-tight sealing achieved through live-loaded packing and extended bonnet design, validated for thermal cycling from –196°C to +200°C in LNG and ethylene plants.
Auto-Reg actuator accepts 4–20 mA and HART signals, providing real-time feedback with 0.5% accuracy. Double-acting and spring-return configurations cover 100–5000 Nm.
Precision-machined trim sets in Duplex 2205, Super Duplex 2507, or Inconel 625 with tungsten carbide coating. Available as direct retrofit for existing Fevgroup valves or original equipment.
Modular actuator-to-valve coupling reduces installation complexity. Standard flange and welded end connections allow seamless integration into existing refinery DCS and PLC networks.
Our engineers review your pipeline parameters — pressure, temperature, media composition — to select the correct alloy and trim configuration for zero-leakage performance.
We source 316L, Duplex 2205, or Inconel 625 from certified mills. Each heat lot is tested for pitting resistance and tensile strength before machining begins.
CNC turning and grinding produce seat surfaces within 0.002 mm tolerance. Cryogenic actuators are assembled in a clean room and torqued to specification.
Every valve undergoes shell and seat leakage tests per API 598. Helium mass spectrometry verifies bubble-tight shut-off at rated pressure.
We provide material certificates, NDE reports, and a traceability dossier. The valve is crated with desiccant and shipped with installation instructions.
Typical lead time: 8–14 weeks depending on alloy availability and actuator configuration.
Effective Date: 1 January 2025
This document sets forth the specific definitions, exclusions, and interpretive rules that govern the application of Fevgroup Fluid Control’s product specifications, performance guarantees, and warranty terms. These clarifications are intended to resolve any ambiguous language in our technical literature and contractual documents, ensuring a common understanding between Fevgroup and its customers regarding the capabilities and limitations of our high-pressure valves, cryogenic actuators, and corrosion-resistant trim sets.
The term “zero-leakage” as used in Fevgroup product documentation refers to a bubble-tight shut-off condition verified in accordance with ISO 15848-1 Class A or ANSI/FCI 70-2 Class VI, as applicable. This performance is guaranteed only when the valve is installed and operated within the pressure, temperature, and media compatibility limits specified in the relevant product data sheet. Leakage rates exceeding these standards due to improper installation, thermal cycling beyond rated limits, or exposure to media not listed in the material compatibility table are excluded from warranty coverage.
References to “high-grade stainless steel alloys” or “Hastelloy,” “Inconel,” “Duplex,” and “Super Duplex” in our literature are based on the chemical composition and mechanical properties defined by ASTM A182, A276, A479, and B564 as applicable. Corrosion resistance data provided in technical bulletins are derived from laboratory tests under controlled conditions and may not replicate all field environments. The customer is responsible for verifying material suitability for the specific chemical composition, concentration, temperature, and presence of impurities in the process fluid.
Actuator torque ratings, stroke times, and positioning accuracy are specified at standard supply pressure of 5.5 bar (80 psi) using clean, dry instrument air per ISO 8573-1 Class 2.2.1. Deviations in supply pressure, air quality, or ambient temperature outside the range of -20°C to +60°C will affect performance and must be factored into the system design. The integrated digital positioner’s 0.5% accuracy is based on a 4-20 mA input signal with a maximum loop impedance of 600 ohms; HART communication requires a minimum impedance of 230 ohms at the receiver.
Fevgroup Fluid Control warrants its products against defects in material and workmanship for a period of 18 months from the date of shipment or 12 months from the date of commissioning, whichever occurs first. This warranty does not cover normal wear, damage caused by misapplication, unauthorized modification, improper storage, or failure to follow installation and maintenance instructions. In no event shall Fevgroup be liable for consequential, incidental, or indirect damages, including but not limited to loss of production, downtime, or environmental cleanup costs.
For the avoidance of doubt, the following terms used in Fevgroup documentation have the meanings set forth below. These definitions supersede any conflicting definitions in general industry usage or in the customer’s standard terms and conditions.