SAMSON LIQUID RING VACUUM PUMPS VACUUM LIMITER INSTRUCTION MANUAL FOR VACUUM LIMITER ATEX APPROVED DOC4000E

Transcription

1 TRUCKS FOOD SAMSON LIQUID RING VACUUM PUMPS INSTRUCTION MANUAL FOR VACUUM LIMITER ATEX APPROVED DOC4000E OFFSHORE FISH INDUSTRY VACUUM LIMITER

2 2

3 CONTENTS 1 Introduction Declaration of incorporation Explanation of warning symbols Functional description Technical data Materials Sectional drawing Dimensions Installation & adjustment Installation Adjustment...8 Vacuum limiter 3

4 1 INTRODUCTION 1.1 Declaration of incorporation Declaration of incorporation Annex IIB Samson Pumps A / S Petersmindevej 21 DK-8800 Viborg Hereby declares that the following product: Conforms to the following directives: Machinery Directive 2006/42/EC ATEX Directive 2014/34/EU Explosion protection as follows: Vacuum limiter, item No.: II 2G Ex h T80 C Gb I hereby declare, that sections 1.1.2, 1.2.2, 1.3.2, 1.5.2, and of the Machinery Directive Annex I and the ATEX Directive 2014/34/EC are fulfilled, and the product are in conformity with the following harmonized standards: DS/EN ISO12100:2011 DS/EN :2011 DS/EN ISO :2016 DS/EN ISO :2016 Safety of machinery - General principles for design - Risk assessment and risk reduction Explosive atmospheres - Explosion prevention and protection - part 1 : Basic concepts and methodology Explosive atmospheres - Part 36: Non-electrical equipment for explosive atmospheres - Basic method and requirements Explosive atmospheres - Part 37: Non-electrical equipment for explosive atmospheres - Non-electrical type of protection constructional safety "c", control of ignition sources "b", liquid immersion "k" The standards are used to the extent it is relevant to the product. The product must not be used before the complete system, which it must be incorporated in, has been conformity assessed and found to comply with all relevant health and safety requirements of 2006/42/EC and other relevant directives. The product must be included in the overall risk assessment. Vacuum limiter may only be used on a Samson Pumps liquid ring pump or unit. Viborg, Kelvin Storm Jensen R&D Manager Samson Pumps A/S DOC4002C info@samson-pumps.com Samson Pumps A/S Petersmindevej 21 Web Phone DK-8800 Viborg 4

5 1.2 Explanation of warning symbols Important technical and safety instructions is showed by symbols. If instructions are not performed correctly, it may lead to personnel injury or incorrect function of the vacuum limiter. To be used with all safety instructions that must be followed. A failure to follow the instructions may result in injury and/or incorrect machine operation. 1.3 Functional description The SAMSON vacuum limiter is exclusively designed for SAMSON liquid ring pumps! The SAMSON Vacuum Limiter Valve is designed to control the pressure (vacuum) level and to avoid cavitation in the pump. The Vacuum Limiter Valve is installed when the suction line may force the pump to operate below the cavitation limit. Air must then be supplied to the suction side of the pump through the vacuum limiter, which is regulated according to the required pressure. Cavitation arises when the pressure in the pump falls to under the steam pressure for the service liquid, which makes the liquid boiling and steam bubbles arise in the service liquid. Continuous operation will cause great mechanical damage. Adjustment Air inlet Air outlet Pilot pressure (Vacuum) Air outlet Air inlet DOC _4 Vacuum limiter 5

6 2 TECHNICAL DATA 2.1 Materials POS DESCRIPTION MATERIAL 1 Membrane VITON antistatic 2 Membrane housing, upper PEHD antistatic 3 Spindle AISI Driving plate AISI Membrane housing, lower PEHD antistatic 6 Spring guide POM 7 M6x25 allen screw DIN 912 A4 8 M6 nut DIN 934 A4 9 M6 washer A4 10 M6 set screw DIN 916 A4 11 O-ring Ø8x2 NBR Shore Spring A2 13 O-ring Ø30x3 NBR Shore Indicator disc 2-Plex 15 Nipple hose Ø6-1/8 BSP AISI Hose strap AISI Hose EPDM 2.2 Sectional drawing A 17 A A-A DOC DOC

7 Dimensions 45 Nipple hose 6 1/8" BSPT 1" BSP Weight [kg] DOC _1 Vacuum limiter 7

8 M6 set screw 3 INSTALLATION & ADJUSTMENT 3.1 Installation The vacuum limiter may not be installed if it is damaged. Repair of vacuum limiter used in Ex zones is not allowed. Install the vacuum limiter on the suction line by using the 1 BSP thread. Connect the hose to the suction line by using the 1/8 BSP nipple hose and the two straps, which are included in the kit. If you have an exsisting installation, you are able to use M6 nipple hose on your suction line. Note: It is recommended to adjust the valve to the lowest set pressure as possible to avoid cavitation in the pump and unacceptable noise from the air inlet. Capacity curve DOC DOC Adjustment A failure to comply the adjustment described below, may result in damage to the vacuum limiter. Step 1) When the pump is running, close the valve by turning the M6 set screw counter clockwise (-direction) Step 2) Open the valve by turning the set srew clockwise (+direction), until the required set pressure is reached. DOC _2 8

9 Notes: Vacuum limiter 9

10 Notes: 10

11 Notes: Vacuum limiter 11

12 SAMSON PUMPS Samson Pumps is the only company in the world to specialise exclusively in liquid ring vacuum pumps. Samson pumps are made in Denmark and used around the globe. We offer worldwide delivery, and we export to more than 80 countries around the world. For over 40 years, our name has been synonymous with the strongest pumps for vacuum trucks and tankers. We constantly adapt our products to meet the changing needs of our customers. Today, it is not enough to simply produce a pump. Products must be refined so the customer can concentrate on what they do best. We therefore offer a wide range of standardised components that allow our customers to build vacuum systems without the need for specialist in-house expertise. Strength and durability are our hallmarks! We have often heard from customers that our pumps are working in many years, and in most cases without the need for maintenance or repair. This emboldens us to say that we have the strongest program of pumps on the market. info@samson-pumps.com Samson Pumps A/S Petersmindevej 21 Web Phone DK-8800 Viborg