ATEX-certified pressure rotary lock

A pressure rotary lock is a system of two rotary valves interconnected by a pressurization chamber. The pressure rotary locks enable pressureless feeding or discharge of powders or liquids to or from overpressure or vacuum-pressure areas. The pressure rotary locks are installed at gravity transfer points at a maximum pressure differential up to 10 bars. If ATEX 95 certified, the pressure rotary locks can be operated in Ex-zones or as standalone explosion isolation systems.

Applications

Discharge of powders / liquids from overpressure or vacuum-pressure areas;
Feeding of powders / liquids to overpressure or vacuum-pressure areas;
Dispensing of powders / liquids;
Explosion isolation in Ex-zones;
Examples of installation locations: outlet connections of cyclone separators, air filters, or dryers.

Technical specification

A complete pressure rotary lock with automatic aeration / deaeration of the pressurization chamber;
Optional ATEX-certified versions available on request;
Optional DMT-certified flame-arrester versions with resistance to violent pressure shockwaves;
Double-wall casing permits heating;
Nominal diameter range: DN 50 to DN 1200, PN6 to PN 16;
Max. pressure differential ≤ 10 bar (DN size dependent).

Scope of works

Selection of optimized unit;
Delivery and installation;
Inspection and servicing.

Model approach to explosive safety in an industrial plant

Model approach to explosive safety in an industrial plant

Step 1
ATEX Audit

During the ATEX Audit, we will focus on deficiencies in explosive safety and indicate tasks that should be performed first to have the strongest impact on safety improvement.

Model approach to explosive safety in an industrial plant

Step 2
Protection Concept

The result of the ATEX Audit is also a preliminary concept of protecting the installation from explosion. It allows estimating the costs of protections. After testing the explosiveness parameters of the dust from the installation, we move on to the final concept and design.

Model approach to explosive safety in an industrial plant

Step 3
Design and selection of protections

After accepting the concept and testing the explosiveness parameters of the dust from the installation, we proceed to the final selection of explosion protections and create a design that takes into account all required changes in production.

Model approach to explosive safety in an industrial plant

Step 4
“Turnkey” delivery and installation

We coordinate the entire delivery and installation process of protections. We have our own service teams with experience in performing installation without the need to stop the investor’s plant operation.

Model approach to explosive safety in an industrial plant

Step 5
Execution of ERA and EPD

We conduct a post-implementation Explosion Risk Assessment (ERA) and prepare (or update) the Explosion Protection Document (EPD). We usually also conduct training for the crew in the field of explosive safety.

Secure your industrial plant

Completed projects

Explosion Risk Assessment and Explosion Protection Document for three aluminium profile powder coating systems

Delivery and assembly of four VQ flameless explosion relief systems on biomass fuels silo in one of Polish combined heat and power (CHP) plants

Explosion Protection Document for a leading manufacturer of baby food

Spark Extinguishing System

Spark Extinguishing System for Dust Collection System

Explosion Risk Assessment for a Confectionery Manufacturer

EPD update for an FMCG industry customer

Explosion Risk Assessment for a charcoal briquetting line

Furnishing of 9 tanker unloading stations at a new power unit with earthing control systems

Conducting specialized ATEX training for oil tycoon

Successive deliveries of electric grounding and bonding systems for the largest manufacturers of plastic film packaging

Explosion Protection Document for a manufacturer of construction chemicals

Safety Audit for an Upholstered Furniture Manufacturer

Preparation of the operation hazards analysis according to the HAZOP methodology for the flue gas denitrification system in a combined heat and power plant

A comprehensive Explosion Protection Document developed for a leading heating company

Adjustment of 3 new lines of a malt storage and transport plant to the requirements of the ATEX directive for one of the largest breweries

Initial Explosion Risk Assessment for the designed alternative fuel collection, storage and transport system

Supply of grounding control systems for process installations, road tankers and drums and tanks

Supply of grounding control systems for process installations, road tankers and drums and tanks

Explosion Protection Document for a leading manufacturer of large scale wash basins

Dedicated Explosion Safety System (DESS) for four dedusting installations in the pharmaceutical industry

Explosion protection of technological equipment in a coal mill

Comprehensive explosion protection of technological equipment in a coal mill

A multi-stage project to stringent requirements or the supply of Ex-rated earthing

A multi-stage project to stringent requirements or the supply of Ex-rated earthing, lighting and electrical engineering systems for an R&D centre

Explosion protection of two crusher lines in the new power unit

Explosion protection of a spray dryer

Explosion Risk Assessment – risk of explosion of dust in production of rapeseed oil for technical purposes

Supply of earthing systems for the new plant of a construction chemicals manufacturer

Earthing controllers for a leading packaging manufacturer

How did we resolve problem of electrostatic discharges in the paint and varnish industry

Over a Dozen of Earthing Control Systems for a Manufacturer of Eyeglass Lenses

Design and erection of emergency fire water supply system based on a diesel-powered pump

Supply of decompression panels for a furniture manufacturer

Explosion protection of a cyclone filter in a malt manufacturer’s plant

An explosion in the food industry

An explosion in the food industry that changed everything. A case study and changes implemented by the WOLFF GROUP

Explosion and fire hazards in industrial environments: how to protect yourself from dust. A case study.

Explosion Safety Audit in the biomass block of a thermal power plant

Supply of HRD explosion protection systems for securing the particle board forming installation

protecting a dust collection systems

Protecting a dust collection systems against dust explosions or the fourth time lucky

ATEX or EPD

ATEX or EPD audit – which is more important using the example of a spray dryer

Explosion prevention and isolation supplied

Explosion prevention and isolation supplied for a cardboard manufacturer

Power Industry Looks after Safety of Their Facilities – Explosion Protection Document for Four Heating Plants and Two Boiler Houses

Analysis and assessment of explosion risk for a dedusting filter project

Explosive Sugar or How Sugar Factories of the Pfeifer & Langen Group Enhance Production Safety

Supply of earthing system for a printing machine

Comprehensive Explosion Protection of Newly Delivered Bulk Food Product Acceptance and Storage Line

Delivery of modified ground control systems of tankers with additional automation systems

The WOLFF GROUP, together with the National Fire Service, will provide a training programme for fire protection experts

Lighting Fittings and a Hydrogen Detection System for a Submarine

Explosion Protection Document for a Starch Calcination Plant

Grounding of road tankers equipped with pump distribution systems

Grounding of road tankers equipped with pump distribution systems – how to block the product transfer in the case of lack of proper grounding

ATEX Lighting – how to reduce costs

Explosion Risk Assessment for the technological line for baby diaper manufacture

Explosion risk assessment at the design stage of a catalytic flue gas denitrification system

Supply of eight non-standard decompression panels for the protection of boiler flue gas ducts

Explosion Protection Document, Explosion Risk Assessment and Explosion Hazard Assessment for existing and new cosmetics production installations

Explosion Protection Document for Maize Grain Process Line

Protection of a bucket elevator

Explosion suppression and isolation system for a bucket elevator: how to blast proof a brewery

Instruction of operating electrical devices working in explosion hazard zones for a cosmetics manufacturer

Design and production of ventilation systems for a plant producing bathroom fittings and sanitary equipment

Dust monitors for dust collection systems

Dust monitors for dust collection systems

Delivery of Electrostatic Earthing Systems for a Pharmaceutical Plant as Aimed at Adapting Production Facilities to the ATEX Requirements

Explosive safety upgrade of sugar silos following the recommendations of the EPD

Enhancing the safety level at the flour manufacturer’s plants by selecting appropriate systems for earthing road tankers and dump trucks

Explosion risk assessment for a system of barley powder transport to boiler co-combustion

Explosion protection systems for four bucket elevators at a malt manufacturer’s site

Supply of HRD suppression systems for the protection of a fibreboard forming plant

Evaluation of the hazards in the wood fibre drying system area

Electrostatic Earthing Systems for a Manufacturer of Paints and Varnishes

Explosion Risk Assessment for Tobacco Pouches Production Line

SEVESO classification for a paint and varnish manufacturer

Project of modernization of a bucket elevator and chips containers

Explosion Protection Document for a bakery products manufacturer

Delivery of a Dust Extraction Unit for Resin Dusts along with Explosion Protections

Fire Safety Instruction for a manufacturer of powder paints

A series of decompression panels supplies

Knowledge base

explosion in two tanks connected by a channel

Explosion of paracetamol-based dust and its propagation to an adjacent tank. The secondary explosion is even more dangerous than the primary one

VIDEO – explosion in a vacuum cleaner showing what can happen in an industrial central vacuuming, dust extraction or cyclone systems

A sugar dust explosion in an enclosed conveyor caused by many years of neglect

VIDEO – mistaken mixing of liquids in the factory led to the formation of a war gas

A costly problem with explosive atmospheres – how to avoid it?

VIDEO – how an explosion occurs during the mixing and pouring flammable liquids. A video depicting real-life events

decompression_vs_flameless

Decompression panels vs. flameless explosion relief: which one should be chosen?

Explosion relief – panels versus valves Advantages and limitations

Marking of Equipment Designed for Use in Potentially Explosive Atmospheres

Steam Fire Extinguishing in Commercial Power Engineering

ATEX Lighting – how to reduce costs

Explosion safety when using lead-acid batteries

[Case study] Dust cloud ignition caused by static electricity

A mistake in the EPD, or a deliberate act? Or how additional costs arise.

Electrostatic Charge Control in Explosion Risk Zones

VIDEO – isobutane leak led to explosion and fire at ExxonMobil refinery

silo dust monitoring

Is silo dust monitoring an effective solution in explosion prevention?

Dust-mixer-in-which-the-explosion-occurred

Case study — dust explosion in the mixer, causes and effects

[“Rzeczpospolita” daily] – We are building a safe industry

Report of the installation of optical fibre temperature detectors on belt conveyors in Dalkia Poznań ZEC

Fire on a conveyor belt transporting petroleum coke

Fire on a conveyor belt transporting petroleum coke

VIDEO – powerful electrostatic discharge during conveyor belt operation. How to calculate the energy of an electrostatic spark?

Protection of a bucket elevator

Explosion suppression and isolation system for a bucket elevator: how to blast proof a brewery

Some theory – what is SIL

How to Stop an Explosion – Explosion Decoupling Systems

Investment in Dust Collection Systems – How to Set about It?

Dangerous GLUTEN – we do not know if it is bad for you, but it is certainly explosive [Check your product]

Measure a factory – process systems inventory survey

Failure to follow proper handling procedures and ensure proper earthing systems can lead to disaster

Electrostatic discharge as a cause of explosion

hydrogen explosion is gas distributor

7 things you can do to minimise the risk of hydrogen ignition caused by electrostatic discharge

A dust explosion at the mill completely destroyed the plant

A dust explosion at the mill completely destroyed the plant

explosion isolation

A compendium of knowledge on explosion isolation

cryogrinding

What you should know about cryogrinding?

FILM – Electrostatic discharge resulted in ignition and explosion of the vapours of flammable liquid stored in IBC container. Fire broke out. The reason was lack of earthing

Explosion Risk Assessment for the Design Stage of a Plant as Exampled by the Company Lajkonik Snacks Sp. z o.o.

A tragic flour explosion

A tragic flour explosion

VIDEO – road tanker fire – probable cause was electrostatic discharge

VIDEO – road tanker fire – probable cause was electrostatic discharge

EVN explosion relief valves

EVN explosion relief valves as a reliable protection of industrial plants and equipment

Explosion pressure wave as a simple and effective form of protection or a few words about the SNR non-return flap

protect a wastewater treatment plant against a dust explosion

How to protect a wastewater treatment plant against a dust explosion? Analysis with example

Designation of dust explosion hazard zones

Designation of dust explosion hazard zones — introduction

Selection of Anti-explosive Protections – Dedusting and Central Vacuum Systems

Explore the advantages and limitations of explosion protection

Explore the advantages and limitations of explosion protection – a practical guide

Explosion at the Kronospan plant

Explosion at the Kronospan plant in Strzelce Opolskie

Explosion risk assessment and the problems of ensuring safe production in explosion hazard conditions

Explosive coal and biomass in power sector

Explosive coal and biomass may be the next problem for the power sector in the autumn

Fire risk in a waste sorting station. Why and what protection should be used?

VIDEO — a case study which accurately shows causes and effects of aluminium dust explosions

Do you have any questions?

Donat Czapski Grupa WOLFF zdjecie

DONAT CZAPSKI - I am at your disposal

+48 695 244 220

info@grupa-wolff.com

We will answer questions about: offer, technical specification, delivery, assembly.

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