The Neles Easyflow JA Series concentric soft-seated butterfly valve is suitable for a wide range of applications, including manual or automatic on-off control and throttling control.
JA Series Soft-Seated Butterfly Valve | Neles Easyflow™
Neles Easyflow
JA Series Concentric Soft-Seated Butterfly Valve | Neles Easyflow
Concentric soft-seated butterfly valve for on-off and throttling control, available in DN50–DN600.
- Category
- Butterfly Valves
Selection points
Two-Piece Stem High-Flow Design
The JA Series features a two-piece stem design developed for control applications, delivering a higher Cv value for applications requiring both on-off and throttling control.
FAQ
Can Neles Easyflow JA Series butterfly valves be used for both on-off and throttling control?
The JA Series features a concentric disc and resilient seat design for manual or automatic on-off operation as well as throttling control. The two-piece stem design helps increase Cv and flow capacity. A close-fitting square drive connection between the stem and disc supports accurate and repeatable shutoff and control.
Which nominal size and piping connection parameters should be checked when selecting a JA Series butterfly valve?
The JA Series is available in nominal sizes from DN50 to DN600 (NPS 2-24), with pressure classes including PN10, PN16, and Class 150. Listed flange compatibility includes EN 1092 PN10 and PN16, and the face-to-face dimensions comply with the requirements of API 609 Category A, Table 2. During selection, verify the nominal size, pressure class, mating flange, and face-to-face dimensions separately. Connection compatibility cannot be determined from the pressure class alone.
What is the difference between the JA Series bonded elastomer cartridge seat and a non-bonded seat?
The JA Series uses a bonded elastomer cartridge seat, which helps prevent the pinching and tearing that can occur with non-bonded seat designs. It also helps maintain stable operating torque, extend cycle life, and improve flow in control applications. The seat can be removed and replaced when maintenance is required.
How is an operator installed on JA Series butterfly valves, and what design protections are provided during actuator removal and installation?
The JA Series is equipped with an ISO 5211 mounting flange for direct installation of a handle, gear operator, manual override, or actuator. Both the upper and lower stems feature blowout-proof protection, and the design prevents the disc from being lifted or displaced during actuator installation or removal.
What media and industrial systems are JA Series butterfly valves suitable for?
The JA Series is suitable for water and wastewater, sewage treatment, mining and other slurry applications, fuel oil and gas, cooling-water or chilled-water circuits, seawater desalination, HVAC, cement and other fine powders, as well as mildly corrosive chemicals and petrochemical media. The series is available with a range of construction materials. Media compatibility must be verified against the selected materials, and the series application range should not be interpreted as meaning that every material configuration is suitable for all listed media.