The VPR 34100 HF Pneumatic Control Butterfly Valve with Hand Actuation (Part Number / Model: VPR 34100 HF) engineered and manufactured by premier French industrial valve maker Automatic Valve Réalisation (AUTOMATIC VALVE S.A.S. - France) provides a dual-operating control solution. It combines high-accuracy pneumatic flow modulation via a rolling diaphragm actuator with an integrated geared handwheel manual override for independent local manual operation.

PRODUCT OVERVIEW & SPECIFICATIONS (VPR 34100 HF):
- Model Designation: VPR 34100 HF (Vanne Papillon Régulatrice - Avec Commande Manuelle / Hand Actuation).
- Manufacturer: Automatic Valve Réalisation (France).
- Integrated Manual Override: Features a rugged geared handwheel assembly, allowing plant technicians to position, throttle, or isolate the valve manually without pneumatic pressure during plant commissioning, valve testing, or control loop power failures.
- Nominal Diameter Spectrum: Available from DN65 (2-1/2") up to DN1300 (52"), covering mid-sized to very large industrial ducting networks.
- Rolling Diaphragm Actuation: Utilizes a frictionless rolling diaphragm pneumatic actuator to deliver linear, sensitive throttling action with zero stick-slip and a mechanical lifespan exceeding 1,000,000 cycles.

KEY ADVANTAGES:
- Maximum Operational Versatility: Provides seamless switching between automated DCS control and local manual mechanical positioning.
- Broad Operating Temperature Range: Built to operate reliably across a thermal range from -50°C to +900°C under severe process conditions.
- Live-Loaded Stem Sealing: Employs a graphite gland packing continuously energized by Belleville spring washers, preventing fugitive emissions over extended duty cycles.

• Manufacturer: Automatic Valve Réalisation (AUTOMATIC VALVE S.A.S.)
• Origin: France
• Valve Series: VPR 34100 HF (Belonging to 34100 / 34102 SERIES)
• Valve Type: Pneumatic Control Butterfly Valve with Manual Hand Actuation
• Manual Actuation Interface: Geared handwheel manual override
• Nominal Diameters: DN65 to DN1300 (ND65 - ND1300 mm / 2-1/2" to 52")
• Mounting Style: Wafer-type design for clamping between flanges (PN6, PN10, PN16, PN20, or ANSI 150 lbs)
• Control Characteristic: Approximately Equal Percentage
• Seat Leakage Class: Class II (34100) or Class III (34102 with metal stops) per ANSI/FCI 70-2
• Thermal Operating Range: -50°C to +900°C
• Pneumatic Actuator: High-performance rolling diaphragm actuator (VPR Series)
• Instrument Air Supply: 2.0 to 6.0 bar
• Control Input Signals: 4-20 mA / 0.2-1.0 bar (with optional electro-pneumatic positioner)
• Body & Disc Materials: Carbon steel, high-temperature alloy steel, or stainless steel grades
• Stem Packing: High-temperature graphite with live-loaded Belleville spring compensation
• Actuator Interface: Standardized ISO 5211 mounting pad
• Typical Applications: Industrial hot air recirculation, coal/gas fired boiler exhaust dampers, cement kiln bypass ducts, steel annealing furnace air regulation, and thermal drying systems.