Safety Valves VARIVENT® 488, 483 & Hycom

VARIVENT® Safety valves were specially developed for the food, beverage, and pharmaceutical industries and meet all the relevant standards and regulations such as DIN 11866 or ASME BPE. With a low deadspace inlet area, the unique LESER HyTight assembly, and the optional pneumatic lifting device you have very good cleanability (CIP, SIP). With a large selection of aseptic connections (threaded, flanged, or clamped) the valve can be optimally fitted to different requirements.

Function

Full-life safety valves open pop action so that it is possible to release high mass flow rates or quick occurring pressures. They are often used in steam or gas applications. These valves  open completely even at small pressure rises and can therefore discharge the full mass flow.

Normal stroke safety valves are optimal pressure relief valves. They have got a wide proportional area so that they steadily activate during pressure relief and pressure peaks. Their long proportional phase have nearly full-life character. These similar properties can reduce big mass flows. They are also used as overflow valves and when smaller sizes of full-life safety valves are still to big.

To guarantee that all product touched surfaces can be cleaned hygienically (CIP) or sterilized (SIP) it is possible to get the valves with optional pneumatic lifting device.

Characteristic Features

  • High-quality materials and surface finish
  • Manual or pneumatic lifting device
  • Insensitive to temperature
  • Welded housings in CIP-able design
  • Pocket free and drainable housing design

Application Examples

Safety valves prevent tanks against overpressure for example vessels within a sterilization process or during tank filling. They protect fermentation tanks prior damages in case of unexpected disturbance.

Normal stroke safety valves are optimal pressure relief valves. They have got a wide proportional area so that they steadily activate during pressure relief and pressure peaks. Their long proportional phase have nearly full-life character. These similar properties can reduce big mass flows. They are also used as overflow valves and when smaller sizes of full-life safety valves are still to big.

Safety valves are installed for pressure relief to secure intactness of vessels and other process equipment when media gets solid like chocolate.

HyTight Assembly

Very good cleanability – this is the requirement  for the design of the LESER Clean Service safety valves. These valves are equipped with the HyTight Assembly which offers optimal cleaning possibilities.

The HyTight Assembly with its elastomer bellow covers all parts which are difficult to clean against product contact. Please keep in mind that the elastomer bellow does not compromise counter pressure like stainless steel bellows.

Lifting Devices

Safety valves of the VARIVENT series have got gas sealed lifting devices of the valve disk. This design makes enables the lifting of the valve disk during pipe cleaning to clean all inner parts including seat area and O-Ring. There are either manual as well as pneumatic lifting devices available.

The Safety Relief Valves series 488 were developed in close cooperation with plant owners and engineers. They reliably protect process plants from overpressure without putting hygienic requirements at risk. The whole series has been designed and officially approved according to international standards (DGR 97/23/CG, ASME, GOST, etc.).

A variant for steam, gas and liquid of each valve has been type-tested by TÜV in accordance with German regulations. They comply with the EU directive for pressure equipment and bear the CE symbol. It is type-tested by TÜV in accordance with German regulations for steam, gas and liquids. The VARIVENT(R) Safety Valve Type 488 fulfills the special cleaning and performance abilities which are required for the food, brewery und beverage industry. It has a wide performance area so that is very good applicable for large plants.

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Dear partners,

We would like to inform you that in the framework of preventive measures aimed at effectively addressing the spread of “Covid19” disease and in accordance with the National Public Health Organization guidelines (https://eody.gov.gr/), our company is committed to ensure public health, safety of its partners and employees. Therefore we have recommended the fulfillment of our employees' tasks through teleworking.

The duration of this measure is initially set from 17.03.2020 to 30.04.2020

The design provides full operation, but due to special conditions, delays in specific tasks or communication may occur.

Our company will strive to keep its operation uninterrupted and secure by serving its clientele in ways and timeframes that are judged possible.

We thank you for understanding and we remain at your disposal.


Αγαπητοί Συνεργάτες,

Θα θέλαμε να σας ενημερώσουμε ότι στο πλαίσιο μέτρων πρόληψης με σκοπό την αποτελεσματική αντιμετώπιση εξάπλωσης του κορωνοιού και σύμφωνα με τις οδηγίες υγιεινής & ασφάλειας που έχει ορίσει ο ΕΟΔΥ (https://eody.gov.gr/), η εταιρία μας για να διασφαλίσει τη δημόσια υγεία, την ασφάλεια των συνεργατών και των εργαζομένων της, συστήσαμε την εκπλήρωση των καθηκόντων των εργαζομένων μας, μέσω τηλεργασίας.

Η διάρκεια του συγκεκριμένου μέτρου ορίζεται αρχικά από τις 17.03.2020 έως τις 30.04.2020

Ο σχεδιασμός προβλέπει πλήρη λειτουργία, ωστόσο εξαιτίας των ειδικών συνθηκών, ενδέχεται να παρουσιαστούν καθυστερήσεις σε συγκεκριμένες εργασίες ή και στην επικοινωνία.

Η εταιρία μας θα προσπαθήσει να διατηρήσει αδιάληπτη και ασφαλή την λειτουργία της, εξυπηρετώντας το πελατολόγιο της με τρόπους και σε χρονικά πλαίσια που κρίνονται δυνατά.

Σας ευχαριστούμε για την κατανόηση και παραμένουμε στην διάθεση σας.