Stainless steel 3 valve manifold for differential pressure transmitter

Detailed Product Introduction

The QFF3 series integrated 3-way stainless steel instrument manifold valve is a specialized instrumentation-grade fluid management component engineered to optimize the installation, operation, and zero-point calibration of differential pressure gauges and transmitters. Precision-machined from a single block of high-density forged bar-stock stainless steel, this heavy-duty unit integrates two primary process isolation/block valves and one central equalization valve into a compact, rigid framework. The valve stems are outfitted with protective, functional color-coded dust caps (Red for isolation/block boundaries and Blue for the balancing loop) paired with ergonomic metal T-handles to avoid manual cross-operation in the field. By facilitating absolute process isolation and precise instrument line equalization during routine maintenance or calibration cycles, it eliminates potential leak paths, reduces system downtime, and ensures exceptional security across high-pressure power generation, petrochemical refining, and gas processing operations.

Technical Specifications

• Manifold Configuration: 3-Valve Integrated Instrumentation Manifold Block Layout

• Functional Valve Mapping: Two Primary Block (Isolate) Valves, One Central Equalize Valve

• Model Configuration: QFF3 Heavy-Duty Process Automation Series

• Primary Body Metallurgy: Premium Bar-stock Stainless Steel 316 (SS316) / SS316L / SS304

• Stem and Disc Engineering: Non-rotating hardened conical stem tip design to prevent seat galling and erosion

• Actuation Interface: Heavy-duty ergonomic stainless steel T-bar handles with secure locking set screws

• Visual Safety Coding: Distinct color-coded functional rings on stems (Red: Isolate/Block; Blue: Equalize)

• Stem Packing Material: High-purity adjustable PTFE standard / High-density Graphite for high-temperature tiers

• Process Inlet Connection: 1/2" NPT Female ports (Alternative G or BSPT high-precision thread options)

• Instrument Outlet Connection: 1/2" NPT Female or standard flange mounting face matching standard transmitter footprints

• Nominal Pressure Capacity: Continuous heavy-duty rating up to 6000 PSI (414 Bar / 41.4 MPa)

• Operational Temperature Range: Secure performance from -54°C up to +204°C with standard soft PTFE elements

• Seat Geometry Pattern: Metal-to-metal bubble-tight integrated body seat configuration resisting high-velocity erosion

• Sealing Performance Rating: Meets or exceeds ANSI Class VI and EN 12266-1 Rate A zero-leakage standards

• Stem Protection Guard: Internal safety back-sealing mechanism prevents operational stem blowout under full load

• Bonnet Locking System: Robust safety bonnet locking pins prevent accidental disassembly during high-vibration service

• Internal Flow Passages: Smooth-bore internal pathways polished to maximize flow efficiency and prevent media clotting

• Shell Hydrostatic Validation: 100% factory hydro-tested at 1.5 times the maximum rated engineering limit

• External Surface Aesthetics: Fine matte-brushed sandblasted finish with permanently laser-etched specification markings

• Manufacturing Foundations: Fabricated and certified in strict accordance with MSS SP-99, ASME B16.34, and API 598

• Shipment Integrity Protection: Interfaces are fitted with protective vinyl thread caps and individually clean-room packed