DN50 Valve
Bottom valve with a Y-shaped design and a discharge angle of 60° relative to the valve axis. The valve opens inwards towards the tank, ensuring complete drainage with no residue and no stagnant areas.
Contact us for a bespoke technical proposal request a quote
Choosing the right configuration for your valve is essential to ensure performance, safety and durability. With Nicheline, you can get a truly bespoke solution, designed to meet the specific needs of your system.
What you get when you request a quote:
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Bespoke solution based on dimensions, materials and configuration
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Technical support to help you choose the most suitable valve
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Maximum drainage efficiency, leaving no residue or standing water
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Wide range of materials and certifications for applications, including critical ones
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Flexible configurations (manual, pneumatic, with emergency stop)
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Regulatory compliance and availability of ATEX versions
Request a quote
Request a quote for any type of valve and we will get back to you as soon as possible.
The NICHELINE valve is available in the three actuation configurations described below.
1. Manual Actuation
Manual actuation is achieved via a stainless steel handwheel fitted onto the threaded stem. Rotation of the handwheel transmits motion to the stem, which lifts the plug towards the inside of the tank, ensuring a progressive and controlled opening.
Applications: This version is suitable for applications where a pneumatic supply is neither available nor required.
- Valve control limit switches*
- Positioner with dual limit switches and without limit switches*
- Single/dual temperature probe*
*ATEX version available on request
2. Pneumatic Actuation
The normally closed (NC) version of the valve is operated by a linear pneumatic actuator with a multi-spring diaphragm. In the absence of compressed air, the springs return the plug to the closed position (fail-safe NC).
Technical Specifications
- Mechanical travel indicator
- Integrated body compliant with standard CEI EN 60534-6-1 for the standardised mounting of pneumatic and electrical accessories
- Mechanically adjustable start and end points
- Actuator made entirely of stainless steel
Options
- Conversion to ATEX version by replacing only the actuator (the body is pre-equipped)
- Positioner with dual limit switches*
- Pilot solenoid valve*
- Single/dual temperature probe*
*ATEX version available on request
3. Pneumatic Actuation with Emergency Handwheel
This version differs from the pneumatic version in that it features a top-mounted emergency handwheel integrated into the actuator, which allows the valve to be operated manually in the event of a loss of pneumatic power or a control system malfunction, without having to dismantle the actuator.
Compliance: The bonnet complies with (CEI EN 60534-6-1).
Applications: Recommended version where operational continuity is required even in emergency situations or during maintenance of the pneumatic system.
Options
- Conversion to ATEX version by replacing the actuator only (the body is pre-equipped)
- Positioner with dual limit switches*
- Pilot solenoid valve*
- Single/dual temperature probe*
*ATEX version available on request
Body materials
The valve body can be supplied on request in the following materials:
- EN 1.4404 (AISI 316L)
- EN 1.4301 (AISI 304)
- Hastelloy® C276 (UNS N10276 / W.Nr. 2.4819)
- Hastelloy® C22 (UNS N06022 / W.Nr. 2.4602)
Seals
- Shutter seal in FKM
- Stacking seals in PTFE
- O-ring in VITON®
The valves are fitted with flanges compliant with the UNI EN 1092-1 standard.
On request, they can also be supplied with flanges compliant with ASME B16.58 (formerly ANSI B16.5)
The bottom flange is threaded, allowing the outlet to be oriented according to installation requirements.
- Pressure Equipment Directive — PED 2014/68/EU (with CE marking)
- Flange standard — UNI EN 1092-1 (ANSI B16.5 on request)
- Actuator interface — CEI EN 60534-6-1 for the mounting of pneumatic and electrical accessories
- TA-LUFT on request at –20°C/+200°C (Testing method ISO 15848-1 Ed.2015+AMD 2017)
- ATEX on request
- Complete drainage with no residue or stagnant areas
- Y-shaped geometry optimised for viscous flows
- Adjustable bottom flange
- Wide choice of materials for critical applications
- Compliance with key European standards
- ATEX version available
- Flexible configuration with numerous options