L-40000 Series Control Valves Designed and manufactured to incorporate advanced Italian technology, the series includes a range of sleeve-guided cage-type straight stroke control valves designed to suit a wide range of operating conditions. The L-40000 series control valves are interchangeable Quick-release valve trim, the replacement of different valve trim combinations to meet a variety of process fluid process control requirements, more suitable for high-pressure differential occasions, effectively eliminating the noise, anti-cavitation and anti-cavitation purposes. The series of control valve has the advantages of compact structure, S-shaped flow channel, large volume cavity, small pressure drop loss, large flow rate, large adjustable range and high flow characteristic accuracy. At the same time L-40000 series of control valve trim with the same top of the L-20000 Series pilot-oriented control valve trim interchangeability, greatly reducing the user spare parts, to simplify maintenance procedures. Widely used in metallurgy, chemical industry, petroleum, electricity, environmental protection, light industry and other industrial automation process.

The main specifications: 

Body structure: Straight-through large-capacity cavity, angular cavity 
Body size: 1 "~ 8" 
Body Specifications: JIS10K, 20K, 30K, 40K;    
Connection: Flange FF, RF, RJ and LG; Welded (special conditions or 2 "SW, 21/2" BW)

On the bonnet: Standard (for the temperature of -5 ~ +230 ℃ occasions) 
cooling type (for the temperature of -45 ~ 5 ℃ or greater than 230 ℃ occasions) 
extended (for the temperature of -196 ~ 45 ℃) 
Bellows sealed type (for toxic media) 
Jacket type (for insulation occasions) 
Internal structure: L-40500 adopts sleeve-guided balanced dual-valve seat trim, integral standard cage, High-strength structure. 
The L-40600 features a sleeve-guided, balanced, single-valve seat trim, active balance ring, integral standard cage, and high-strength construction. 
The L-40700 features a sleeve-guided balanced inner part, a split porous cage, an optional balance ring, and a high-strength construction. 
The L-40800 features a sleeve-guided balanced inner part, a split labyrinth cage, an optional activity balance ring and a high-strength construction. 
L-40900 uses sleeve-guided balanced internal parts, multi-stage buck valve combination, optional balance ring, high-strength structure. 
Filling material: Teflon type V packing, flexible graphite 
gaskets: Zigzag washer (SUS316L, alloy steel), 
Wound washer (SUS316 + flexible graphite) 
Flow characteristics: Equal percentage characteristic, linear characteristic, quick opening characteristic 
Actuator: Pneumatic : Multi-Spring Actuator L4000 Series; Single Spring Actuator L5000 Series; Cylinder Actuator L6000 Series 
Electronic: Full Electronic 3610L Series, Full Electronic PSL Series (Adjustable Type) 
Electric Type: 3410L Series, UNIC-L Series (Cut off type)