Protego Staging
Trayectoria profesional
4
Contacto
PROTEGO®
Excellence in Safety and Environment

NB/AP

In-Tank Valve with pneumatic actuator

Features

For Cyrogen Tanks
suitable for use on cyrogen tanks
Fail-Safe-Concept
In Event of an Energy Drop, the Valve Piston Seals the Outlet Line by its own Weight
API 625
These Devices meet the Requirements of API 625
Tightness
Good Tightness of the Valve
Emergency Cable in Case of Damage
An Emergency Cable opens the Valve if the Main Cable is Damaged
Pneumatic Cylinder
Devices are kept open by a pneumatic cylinder
Function and Description

Quick-Release Bottom Drain Valves for Cryogenic Storage Tanks

PROTEGO® NB/AP in-tank valves are used in storage tanks for cryogenic liquids in order to seal Seal A seal prevents or limits unwanted transfer of product from one container to another. Seal is used as superordinate term for all types of sealing elements. off discharge lines in the event of an accident or emergency (pipe bursting). These devices meet the requirements of API 625.

Tightness by a lapped metallic valve pallet and relief valve cone

The device Device A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow. consists of the bottom plate Bottom plate A bottom plate forms the foundation inside a tank for the installation of tank accessories, e. g. suction units or tank valves. (1) which has to be welded onto the vessel Vessel Container or structural envelope in which materials are processed, treated or stored. bottom; a nozzle (2) which has to be welded to the discharge line; the flanged fast-acting valve (3) with valve piston (4) and release valve cone (5); and the complete pneumatic actuating device (6) which is mounted onto the roof of the tank. The required tightness is ensured by a lapped metallic valve pallet Valve pallet Valve pallet is the generic term for the assembly that rests on the valve seat. and relief valve cone. The quick-release valve (3) and the actuating system (6) are connected by an actuator cable (7). An additional emergency cable enables the quick-release valve to be opened if the main actuator rope is damaged.

Fail-Safe-Concept

During normal operation, a pneumatic cylinder holds the valves in the open position. The pneumatic cylinder is actuated by a control line to lift Lift Lift is the actual travel of the valve pallet from the main valve out of the closed position. the valve piston. The bottom valve is only closed in an emergency. In the event of an energy drop, the valve piston, due to its own weight, falls onto the valve seat Valve seat The valve seat is a component on which the valve pallet rests when the valve is closed. which closes the bottom valve.(fail safe concept).

Customized Solutions for Specific Plant Requirements

The valve design is independent of the nominal size Nominal size The nominal size is an alphanumeric designation of size for components in a piping system, used for reference purposes, comprising the letters DN followed by a dimensionless integer that is indirectly related to the physical size of the bore or outside diameter of the connections, expessed in millimeters. . The nominal size DN 1 is determined by the nominal size of discharge line. Material selection depends on the substance and the operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. .
Product Data

Dimensiones

DN 1 DN 2 abcdefHub
150 / 6"80 / 3"200 / 7.871130 / 44.491430 / 56.30550 / 21.65175 / 6.89465 / 18.31160 / 6.30
200 / 8"80 / 3"200 / 7.871130 / 44.491430 / 56.30600 / 23.62175 / 6.89470 / 18.50160 / 6.30
250 / 10“80 / 3"200 / 7.871130 / 44.491430 / 56.30740 / 29.13175 / 6.89485 / 19.09160 / 6.30

Dimensiones en mm / pulgadas

Material of fast action bottom drain valve

Bottom plate with nozzle*
Valve housing Housing A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. with valve coneStainless Steel
Gasket*
Actuator ropeStainless Steel

* upon request

Material

Housing Stainless Steel
Actuator spindleStainless Steel
Guide bushingCopper
GasketPTFE
Protective capStainless Steel
Pneumatic cylinderAluminium

Data Necessary for Specification

Stored medium
Operating temperature T (°C or °F)
Operating pressure Operating pressure Operating pressure is the pressure existing at normal operating conditions within the system being protected. p (bar or psi)
Connection size DN 1
Tank height (m or ft)

Selección y Diseño

The main process data and product Product Includes equipment, protective systems, devices, components and combinations of these. properties of the stored medium as well as the temperature of the stored product determine the material for the specific valve. Subsequently the nominal diameter and the type of connection are checked and selected.

The in-tank valve In-tank valve An in-tank valve is located inside a storage tank and is open under normal working conditions. is available in nominal diameters of DN 150 mm / 6"and DN 200 mm / 8", whereas the connection for the pneumatic actuating device has a nominal diameter of DN 80 mm / 3".

The length of the actuator rope and of the emergency rope is determined by the height of the tank. The final adjustment is completed during installation. The material for the gasket is determined based on the operating conditions and/or other special requirements.

The material of the valve bottom plate needs to be compatible to the material of the tank bottom plate. If the material of the bottom plate is provided by the tank manufacturer, then close coordination between manufacturing planning and installation planningis necessary.

 For special requirements the valve and the actuation system (e.g. with inductive position indicator) can be supplied with a special design.

Deviations from our standard design will be sized and specified with the support of our engineers for the specific application.

Tipo de bridas de conexión

EN 1092-1, Form B, PN 40 or upon request
Applications