MOOG G771K203 Servo Valve | MOOG Electrohydraulic Servo Valve

Description

PRODUCT OVERVIEW

Moog G771K203 belongs to the classic G771K explosion-proof servo valve series, adopting dual nozzle-flapper pilot stage + dry torque motor + mechanical feedback two-stage structure. It converts analog electrical control signals into precise proportional hydraulic flow output, serving as the core executive component of steam turbine DEH speed control system. Featuring ultra-fast dynamic response, ultra-low hysteresis and high resolution, it stably adjusts the opening of turbine control valves to realize closed-loop precise regulation of unit speed and active power. The explosion-proof structure adapts to flammable and explosive environments in turbine rooms, with excellent anti-vibration, anti-pollution and high-temperature resistance. Widely used for overhaul replacement and emergency spare parts backup of thermal power units, gas turbine governing systems, high-precision hydraulic test benches and metallurgical rolling mill hydraulic control systems.

TECHNICAL SPECIFICATIONS

COMMERCIAL PROCUREMENT PROTOCOL

1. Matching Inspection: Our technicians verify turbine model, DEH cabinet firmware and original valve parameters to realize plug-and-play replacement.
2. Tiered bulk pricing: Preferential price for bulk orders, real-time stock and international freight are updated synchronously.
3. Export document support: Complete customs documents and unified HS declaration to ensure smooth customs clearance worldwide.
4. Formal PI issuance: Issue official proforma invoice to support your internal financial approval and payment process.
5. Payment mode: Secure payment via T/T wire transfer and other formal enterprise settlement methods.
6. Strict pre-delivery test: Each servo valve passes hydraulic sealing test, flow characteristic calibration and dynamic response test before delivery.
7. Export packaging: ESD anti-static bag + high-density shockproof foam + thickened reinforced carton to protect precision spool components during long-distance transportation.
8. Global logistics: Shipped by DHL, FedEx, UPS official channels; tracking number will be provided after shipment.

VISUAL PRODUCT SHOWCASE

1. Product Photo 1: Overall physical appearance of Moog G771K203 servo valve

1. Product Photo 2: Close-up of valve body nameplate, oil ports and electrical connector

1. Product Photo 3: Installation dimension drawing for hydraulic manifold layout

MATCHING SUPPORTING SPARES & TECHNICAL DOCUMENTS

Turbine DEH main control system, integrated hydraulic manifold, high-pressure seamless hydraulic pipeline, high-precision filter assembly, maintenance sealing spare kit, Moog official performance test report, complete installation dimension drawing and standardized safety operation specification for servo valve disassembly & replacement，MOOG G771K200A

AFTER-SALES SERVICE & WARRANTY TERMS

A 12-month quality warranty period is provided for inherent hardware failures under rated normal operating conditions, with free repair or calibration replacement service within the warranty scope. All supplied Moog G771K203 servo valves are original genuine products (brand new original packaged products or second-hand disassembled valves after full calibration on professional servo test bench). Its flow control precision and installation dimensions are completely consistent with original factory design standards. We provide electronic delivery of official datasheets, detailed installation & debugging specifications and field replacement safety guidelines. Long-term free remote technical services cover on-site calibration of servo valves, joint debugging of DEH governing system and diagnosis & elimination of abnormal faults in hydraulic systems.

FAQ

What core control value does G771K203 provide for the turbine DEH governing system?As the terminal execution unit of the electro-hydraulic conversion link of the governing system, it accurately tracks the electrical instructions output by the controller, drives the steam valve actuator to dynamically adjust steam intake, suppresses grid frequency fluctuation caused by load changes, and guarantees the stable, safe and economical operation of thermal power units.Does replacing this servo valve require long shutdown debugging for the whole unit?The installation size and oil circuit layout are fully unified with the original valve. Only simple zero correction is needed after physical replacement, and the unit can be put into normal operation quickly without modifying the original control program logic.Are recycled second-hand servo valves required to complete full calibration procedures before delivery?All recycled disassembled valves will complete professional hydraulic cleaning, internal leakage inspection, full-scale flow calibration and dynamic response testing on the servo test bench item by item to restore original factory performance indicators before shipment.Delivery lead time for spot inventory products?Spot products are stored in domestic warehouse, all delivery formalities can be fully completed within 3 working days after the buyer’s payment review and confirmation.

Contact info

• WhatsApp: +86 13313703791
• Email: seren@ymgkplc.com
• Phone: +86 13313703791
• Wechat: +86 13313703791
• Website: www.xiongbaparts.com