Pressure relief with Broady Flow Control
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1 Safety Relief Valves 3 Pressure relief with Broady Flow Control Series 6 Safety Relief Valves Broady Flow Control
2 The Company Broady Flow Control is an Independent Valve Manufacturer, specialising in Innovative and effective Solutions to satisfy it s increasing customer demands, challenges and problems in flow control. MARKET SECTORS Naval & Marine Chemical & Petrochemical Food & Beverages Industrial gases Biotechnology Mining Fire protection Oil & Gas Pharmaceutical Power generation Four key divisions Introduction The Type 6 Series of valves are direct acting full lift safety relief valves that are designed to open rapidly and re-seat at a controlled pressure, essential in such diverse applications as petro-chemical, power generation and pharmaceutical. The Series 6 - relief valves. THE 6 FEATURES Direct acting, full lift Safety Relief Valve Pop action design Gas, vapour and liquid service Manufactured in Carbon Steel and Stainless Steel as Standard Other materials on request Screwed or Flanged from 5mm x 5mm to 5mm x 5mm Maximum Set pressure 4 Barg Relief. Safety relief. Pressure Valves for Naval, Marine and reducing & sustaining valves. other specialist applications. 3 Pattern makers & Master founders of corrosion resistant copper based alloys. 4 Overhaul & Refurbishment of Broady valves and other selected valve manufacturer s products and equipment.
3 Series 6 - Operation, Installation The Type 6 Relief / Safety Relief valves are designed to have a short simmer, then to open rapidly to the full open position, and to re-seat at a controlled pressure. When the valve is in its fully lifted position, the discharge area is controlled by the bore of the nozzle, which ensures that the flow calculations for various mediums can be reliably made. Valves are supplied in sizes / to and can be manufactured in gunmetal, cast steel and stainless steel with ends screwed male x female, female x female or flanged to customers requirements. Valves can also be supplied with a packed lever lifting device, limit switch to indicate opening and closing of the valve, governing ring to lim it adjustment of the spring to the set point, for ease of re-setting. Installation During installation of the valve avoid bumping or shaking to prevent damaging the flange faces and misalignment of the trim. Blow through the circuit line on which the valve is to be installed, this is to remove any foreign bodies. Clean the valve and nozzle connections thoroughly; foreign bodies on the nozzle may damage the valve seat during popping. Install the valve in a vertical position only, with the inlet downwards. After the valve has been installed, make it pop at least twice to allow automatic alignment of the trim. Misalignment may be caused accidently during transport or during installation. Maintenance The most frequent operation to be carried out is a precise check, made at regular intervals, to observe whether any obvious faults exist in the different parts of the valve. It should be checked first of all that there are no leakages; these must be avoided, especially when the fluid is poisonous, highly volatile or very explosive. Carry out periodic venting for valves with a lifting device to check regular operation (at least two or three times a year). During these tests the pressure must be at least 75% of the full working pressure. OVERALL DIMENSIONS valve size A B Screwed valves / x 3/4 x x Flanged valves / x 3/4 x 8* 97* x C weight 9 3. kg 3* 6. kg *Dimensions given are only for ANSI5 RF flanges PARTS LIST item description material (C ) material (S 3 ) cap plug/gag stainless steel stainless steel joint (plug gag) non asbestos non asbestos 3 cap carbon steel stainless steel adjusting screw stainless steel stainless steel 5 locknut carbon steel stainless steel 6 joint (cap) non asbestos non asbestos 8 spring stainless steel stainless steel 9 spindle stainless steel stainless steel C disc holder stainless steel stainless steel ball stainless steel stainless steel disc stainless steel stainless steel 3 lockscrew stainless steel stainless steel 4 joint (lockscrew) non asbestos non asbestos 5 blowdown ring stainless steel stainless steel B 6 joint (body) non asbestos non asbestos 8 spring carrier stainless steel stainless steel 9 grubscrew stainless steel stainless steel circlip stainless steel stainless steel body carbon steel stainless steel A nozzle stainless steel stainless steel
4 Series 6 - Overhaul PRESSURE AND TEMPERATURE LIMITS type number orifice area (sq.in.) cm sq.inch inlet x outlet temperature max. set pressure kg/cm psi max. back pressure kg/cm psi 6-C 6-C 63-C,58, / x 3/4 x x + C to +4 C +39 F to +75 F 4 8, 4 6-S 6-S 63-S,58, / x 3/4 x x -9 C to +538 C -3 F to + F 4 8, 4 Overhaul To overhaul the valve the following must be carried out: Remove the cap, mark the position of the adjusting screw relevant to the locknut, so the correct position may be found during re-setting. Loosen the adjusting screw and locknut to relax the spring. 3 Remove the lockscrew from the body, to free the blowdown ring. 4 Unscrew the nozzle from the body and remove the complete assembly from the inside of the the body. 5 Check the contact faces of the seat and disc, should any scratching or pitting be present the surfaces will need to be relapped. 6 Replace all of the joints then assemble the valve in reverse order. To prevent damage to the disc and nozzle faces, place a screwdriver in the spindle slot. This will stop the spindle turning whilst resetting the valve. air capacities in NM 3 /hr (% accumulation) set pressure Bar (G) PERFORMANCE water capacities in L/min (5% accumulation) saturated steam capacities in kg/hr (% accumulation) orifice area (cm ) set pressure orifice area (cm ) set pressure orifice area (cm ) Bar (G) Bar (G)
5 Numbering system code: To simplify the selection and specifying of Safety Relief valves, a numbering system is used in which the digits have a distinct significance. Valves from the Broady range. EXAMPLE A / ANSI #3 RF inlet x ANSI #5 RF Outlet, Stainless Steel Body, trim and spring with a.4 sq in nozzle is: 63-SN-. The first and second digit indicate the valve series. 6 6 The third and fourth digit identify inlet and outlet ratings respectively. third digit inlet rating How to order To enable Broady Flow Control to offer the most suitable valve for your service please provide the following information at the enquiry stage: Set Pressure Back Pressure, built up or constant Reducing Valves A, AB, CL, CN, CH, D, B NPT(M) 5 3 Medium, with any relevant data, specific gravity or molecular weight etc. 4 Flowrate Temperature PED/CE Category* Normal working pressure 8 Accumulation (%, % or 5%) 7 forth digit 5 Outlet rating NPT(F) 9 Blowdown Material requirements Accessories, lifting lever etc. Material Certification requirements Safety relief valves to API and ASME - Type 35 Fire Fighting Hydrant Reducing Valves 5 3 Any special testing requirements 3 The fifth digit identifies: the orifice for flanged valves. fifth digit inlet rating / x 3/4 x 3 x The sixth digit identifies the Nozzle, body and spring material. The first six are required as a basic minimum to enable our sales team to proceed with a quotation. *According to the Pressure Equipment Directive (PED) Safety Valves are categorised as a safety accessory and as such the normal level is category IV, unless the system to which they are to be fitted is of a lower level in which case the lower level should be used. The PED is only applicable to Countries within the European Union. Sustaining Valves Type A, Type D, Type 9 Pilot Operated Safety Valves Flowsafe Speciality casting from in-house foundry in non-ferrous metals Full repair facilities The Series 35 Safety Relief valve has been combination flow tested with bursting discs from continental (CDC) Disc Corporation. sixth digit nozzle body spring The seventh digit indicates the type of construction. N Standard C A6 WCB The eighth digit identifies the bonnet open or closed S A35 CF8M Closed L A35 LC The ninth digit identifies the lifting device. A A7 WC6 None M Monel BS37 NA Packed lever The tenth digit refers to the gag. GM Gun Metal BS4 LG Without Gag AB Aluminium Bronze BS4 AB With Gag
6 Broady Flow Control Limited English Street Kingston upon Hull East Yorkshire HU3 DU telephone: +44 () facsimilie: +44 () website:
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