The 34100 SERIES Industrial Control Butterfly Valves (including standard configurations such as VPR 34100 CF, VPR 34100 HF, and VPR 34100 HFI) engineered and manufactured by premier French industrial valve maker Automatic Valve Réalisation (AUTOMATIC VALVE S.A.S. - France) are heavy-duty wafer valves designed for demanding flow modulation where absolute bubble-tight shut-off is not strictly required. They cover an extensive operating spectrum handling gaseous and liquid fluids from -50°C to +1050°C.

PRODUCT OVERVIEW & SPECIFICATIONS (34100 SERIES):
- Product Series: 34 100 Series (Industrial Control Butterfly Valves).
- Manufacturer: Automatic Valve Réalisation (France).
- Nominal Size Range: Available from DN65 (ND 65 mm / 2-1/2") up to DN1300 (ND 1300 mm / 52"), accommodating large industrial air ducts and process lines.
- Aerodynamic Disc Design: Straight butterfly disc geometry with high-precision CNC machining or integrated turbulators to linearize flow behavior into an approximately equal percentage flow characteristic.
- Anti-Jamming High-Temperature Precision: Precision tolerances engineered between disc and body prevent thermal binding or mechanical jamming at extreme furnace temperatures up to 900°C - 1050°C.
- Standardized Actuation Interface: Equipped with top mounting pads compliant with ISO 5211, enabling direct integration of long-stroke rolling diaphragm pneumatic actuators (VPR series) or industrial electric rotary actuators.

KEY ADVANTAGES:
- Extraordinary Thermal Range: Available in cold or hot configurations, designed to endure severe temperature cycles between -50°C and +1050°C without mechanical distortion.
- Self-Compensating Shaft Packing: Features a live-loaded stuffing box energized by constant-tightening spring washers, ensuring dependable stem sealing over long service intervals without routine repacking.
- Certified Leakage Tightness: Conforms to Leakage Class II per ANSI/FCI 70-2 (seat leakage limited to 0.5% of Cv in cold versions and 1% of Cv in hot versions).
- Superior Mechanical Endurance: Tested to exceed 1,000,000 operational cycles in sequential service without requiring valve maintenance under normal operating conditions.

• Manufacturer: Automatic Valve Réalisation (AUTOMATIC VALVE S.A.S.)
• Origin: France
• Valve Series: 34100 SERIES (VPR / VPS 34100)
• Valve Type: Industrial Control Butterfly Valve
• Nominal Diameters: DN65 to DN1300 (ND65 - ND1300 mm / 2-1/2" to 52")
• Mounting Style: Wafer-type design for clamping between pipe flanges (NP6, NP10, NP16, NP20, or ANSI 150 lbs)
• Control Characteristic: Approximately Equal Percentage
• Seat Leakage Class: Class II according to ANSI/FCI 70-2
  - Cold Version: 0.5% of total Cv
  - Hot Version: 1.0% of total Cv
• Operating Temperature Range: -50°C to +900°C (up to +1050°C with high-nickel alloy execution)
• Body & Disc Materials: Carbon steel, cast alloy steel, or high-temperature stainless steel grades
• Shaft Packing: High-temperature graphite packing gland with constant-tightening Belleville spring washers
• Actuation Options:
  - Long-stroke pneumatic actuator with rolling diaphragm
  - Industrial quarter-turn electric actuator
  - Manual hand lever or worm gearbox
• Actuator Mounting Interface: Standardized ISO 5211 flange
• Mechanical Operating Endurance: > 1,000,000 maintenance-free operating cycles
• Typical Applications: Cement plant exhaust gas dampers, hot blast control in steel mills, boiler combustion air regulation, gas turbine exhaust bypass, and industrial incinerator ducting.