Fisher 38B5786X092

Technical Specifications

• Product Type: Pneumatic relay assembly (Relay B single‑acting reverse‑type)
• Application Object: Fisher smart‑valve‑positioner series (DVC‑series compatible)
• Working Medium: Clean‑dry instrument‑air
• Shipping Weight: 2 kg
• Component‑set: Complete assembly including pneumatic‑valve‑core, spring‑components, sealing‑gaskets, mounting‑hardware and connecting‑accessories
• Operating‑pressure‑range: Matches instrument‑air supply‑pressure of supporting‑positioner
• Material of wetted‑parts: Alloy‑metal precision‑machined parts, elastomer‑sealing‑materials for instrument‑air service
• Functional Features
• Achieves reverse‑action pneumatic‑signal conversion for single‑acting‑actuator control
• Amplifies low‑level positioner‑internal pilot‑signal to high‑flow‑output‑air‑signal to drive valve‑actuator
• Precise spring‑and‑valve‑core‑matching ensures stable‑output‑air‑pressure corresponding to input‑signal
• Complete‑assembly‑unit facilitates on‑site replacement‑maintenance without complicated‑part‑matching
• High‑reliability‑design for long‑term continuous‑operation in process‑plant‑instrument‑loops
• Strict‑original‑manufacturing‑tolerance‑control guarantees‑valve‑position‑control‑accuracy after‑installation Application Scenarios: Petrochemical‑industry control‑valve‑positioner‑maintenance, natural‑gas‑processing‑plant‑instrument‑systems, power‑plant‑process‑control‑valves, chemical‑plant‑flow‑pressure‑temperature‑regulation‑loops, paper‑and‑pulp‑industry‑valve‑instrument‑renewal‑projects
• Performance Parameters: Fast‑pneumatic‑response‑time; stable‑gain‑characteristic; low‑hysteresis; good‑anti‑vibration‑performance for‑field‑installation‑environment; output‑air‑flow‑capacity meets‑single‑acting‑actuator‑volume‑demand.
• Material Composition: Precision‑machined metal‑valve‑body, high‑quality‑control‑spring‑steel‑springs, special‑instrument‑grade‑elastomer‑seals, anti‑corrosion‑surface‑treatment‑on‑metal‑components, metal‑fasteners.
• Structural Characteristics: Pre‑assembled‑integrated‑relay‑assembly‑module; built‑in‑spring‑balance‑structure‑for‑signal‑conversion; reserved‑pneumatic‑port‑interfaces‑matching‑Fisher‑positioner‑internal‑air‑circuit‑layout; equipped‑with‑installation‑fixing‑hardware‑for‑direct‑replacement‑installation.
• Working Principle: Adopts‑spring‑balance‑pneumatic‑relay‑principle; receives‑pilot‑air‑signal‑from‑positioner‑pilot‑unit;‑realizes‑signal‑direction‑reversal‑and‑flow‑amplification‑through‑valve‑core‑and‑spring‑force‑balance‑action;‑output‑amplified‑reverse‑action‑air‑pressure‑to‑single‑acting‑valve‑actuator‑to‑realize‑valve‑opening‑and‑closing‑controlAlibaba.
• Installation Requirements: Must‑be‑installed‑inside‑matching‑Fisher‑valve‑positioner‑housing;‑strictly‑follow‑original‑equipment‑air‑circuit‑connection‑sequence;‑use‑clean‑dry‑instrument‑air‑supply‑meeting‑instrument‑air‑quality‑standard;‑ensure‑all‑sealing‑interfaces‑are‑well‑sealed‑without‑air‑leakage‑after‑assembly.