High Flow High Pressure Solenoid Valve. Double 3/2 N.C. solenoid valve with manual override

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1 Double 3/2 N.C. solenoid valve with manual override General The high pressure/high flow capacity solenoid valve, as not available on the market, was especially engineered by BIFFI in the early '70s for the specific operation of gas-over-oil actuators, suitable for high and low pressure, with natural gas and in ambient temperatures from -60 C to +100 C. After many tests in the range of the specific parameters, Biffi dedicated know-how and experience designed a solenoid valve which was later improved and is still in use in the '90s. About 60,000 solenoid valves are now in good operation all over the world as the heart of the high pressure pneumatic control systems. The extreme temperatures of Siberia and Africa were the test benches of our solenoid valve, as well as the hostile ambient conditions of the production platforms in the North Sea or the tropical jungle of Nigeria or alaysia. The unit is guaranteed for good operation, and as such it is particularly suitable in those fields which are not surveyed by technical personnel, e.g. gas pipelines in remote desert areas where actuators operated by the natural gas of the line are most convenient since it is not necessary to lay power supply lines (electric, hydraulic or pneumatic). If required, it is enough to provide electric remote control signals. The reliability of operation after long periods of inactivity is a vital requirement of the field: the dynamic components of Biffi solenoid valve are specifically designed to this purpose with special PTFE dynamic seals which nullify the sticking effects due to long idle periods or extreme temperatures. Zero leakage is assured by the poppet-type trims combined with PTFE resilient seals. The high flow capacity allows the operation of large actuators even with short stroking times. Versatility is another basic characteristic of this unit: a range of materials, additional components and accessories is available to obtain a wide selection of complete control systems. A low power consumption version of solenoid valve is also available: this is a basic requirement in case of long-length electric lines to reduce the voltage drop. It is also ideal in case of electric supply from batteries, when, in lack of electric lines, actuator control is made via radio and power is supplied by solar panels. The vibrations always present in the plant piping were also taken into consideration: this is why we have designed a compact unit where the connections between the pilot zone and the power/inlet/filtering/exhaust zone are totally manifolded. The associated optional accessories to obtain special control system units were also designed to be manifolded to the solenoid valve body or to the manifold plate: this reduces as much as possible the connections by piping, which are possible points of leakage, highly increasing the total reliability of the system. aintenance is also made easier as only the damaged component is removed from the unit. The unit needs no maintenance for its service life but, just in case, trouble-shooting is very intuitive and the maintenance operation is very quick and easy; parts can be replaced on field minimising all possible troubles to the plant process. The reliability of an entire system is due to the reliability of every single component: by choosing a Biffi solenoid valve our customer can rest assured of the trouble-free operation of his plant application. General application - Especially suitable and utilised in the gas applications: gas pipelines, gas reduction stations, compressor stations, gas gathering, storage plants, manifolds, LNG plants and everywhere high-pressure gas can be utilised as a power medium - Heavy duty service where the combination of high pressure gas supply, hostile environment, hazardous areas and extreme temperatures suggest the use of high reliability components - Generally used for control systems of gas-over-oil actuators (GPO and OGK Series) and of direct gas actuators (GIG and GIGS Series) - Also used for low pressure actuators (ALGA, ALGAS, RPD, and RPS Series) acting at low temperature 1

2 Features -This solenoid valve is in the heart of the high pressure control systems. The standard version is fitted with: - manifold plate - control unit container with vent valve - terminal board - gas filter, condensate separator with drain valve - exhaust check valve - Body in anodised aluminium for high reliability in light weight; suitable for every environment condition - ain and pilot trims are poppet-type in order to provide bubble tightness -Internals in stainless steel and anodised aluminium to obtain highest compatibility with the power gas - Sealing seats in teflon, thus granting chemical resistance, lack of sticking and ageing effects -Double solenoid valve in a single body to obtain compact design and avoid external piping interconnection - Solenoid enclosures in weatherproof and explosionproof construction, designed and manufactured by Biffi in accordance with European Norms (CENELEC) certified by the Italian Lab CESI and in accordance with American Standards certified by Factory utual Lab - Local operation, in lack of electrical power, by means of manual override consisting in two levers, one for closing and one for opening - ounting on the proper manifold plate that includes the power and exhaust ports - Weatherproof control unit container to increase the environmental and mechanical protection; the container includes a vent valve to exhaust the pilot gas and to maintain a small pressure inside the container, necessary to avoid the entry of environmental moisture. The container is padlockable to prevent the manual operation by non-authorised personnel. -Gas filter unit to clean the power gas - Terminal board in weatherproof and explosionproof construction; body and cover in die-cast aluminium - Suitable to operate with high pressure gas with no need for pressure reducer, thus increasing the reliability of the control system -Remote control for closing and opening operation through the solenoid valves available with various power supply voltages -odular construction allowing maximum flexibility to obtain special control schematic by assembling various control components directly to the solenoid valve body or to the manifold plate; this modularity minimises interconnecting piping between the control components, therefore the safety and reliability of the complete system is increased. Optional features and special constructions An extensive range of optional characteristics is available. Instead of the standard construction we can offer the following alternatives already studied and experienced on field: - aterials: stainless steel for the body only or for the whole - Body configuration: double or single 3/2 valve - Function modes: Normally closed or Normally open - Control modes: - one or two solenoid valves which can be variously combined with a manual override - external pneumatic pilot signal; - electric impulsive signal: the valve is kept actuated by means of a pneumatic timer device - manual reset after ESD operation, to be performed locally thus increasing the plant safety - Action: - pilot controlled with orifice nominal diameter of 9 mm (standard) or 12 or 15 mm (special) - direct acting with flow orifice nominal diameter of 0.8 or 1.25 mm or 2.5 mm (low pressure) - Connection modes: - flanged to manifold; - 1/8 threaded ports for pilot solenoid valves - Flow capacity: various orifices to enable the operation of small or large actuators within the required stroking times - Ambient temperatures: - extensive experience with temperatures as low as -60 C - heating trace for the body to increase the operation reliability at extreme temperatures lower than -60 C - edium: experienced and proven selection of materials for operation with highly corrosive sour gas - Gas conditioning unit: gas de-hydrating unit available in case of low working temperature and wet gas - Supply voltages: all the standard voltages in direct or alternate current are available; the solenoid valve construction is for direct current, but we accept any alternate voltage through a proper AC/DC rectifier placed on the terminal box enclosure; suppression diodes available to protect the coil from voltage transients - Terminal box: - different dimensions in function of the quantity and size of the cable entries and of the terminals; - padlockable local selector switch integral with the terminal box - Control unit container: three different dimensions are available, according to the size and the number of components fitted on the manifold plate - Pressure measure: gauge with needle valve to check the supply pressure All the above alternatives, already studied and experienced on field, can be combined in various solutions to obtain the required unit. any high pressure modular control components designed and manufactured by Biffi are available on request: - pneumatic pressure switches with intervention for high, low or differential pressure values to obtain ESD automatic operation control or prevention -"line break" detection control device that automatically closes the pipeline valve when the rate of the pressure drop in the gasline exceeds a pre-set value - electric signalling of the emergency operation (i.e., line break intervention) - pneumatic timer device for ESD operation delay - pneumatic device to dedicate the gas supply from the storage tank only to the ESD operation, to increase the safety of the process - pneumatic device to exclude the actuator manoeuvre opposite to the fail operation - pressure regulators This wide variety of solutions allows to obtain the desired control units to suit the most various customer requirements. Biffi continues with research and development in this field, always to be in line with new technologies and customer requirements of plant automation and safety. 2

3

4 De-energised Energised anually operated Power gas in pressure Pilot gas in pressure Pilot gas in exhaust Pilot gas in pressure 4

5 Technical data - Type: double 3-way/2-position N.C., poppet-type spring return solenoid valve - Supply medium: sweet natural gas, air, nitrogen. Sour gas version according to NACE standard R0175 available - ax operating pressure: 120 bar (1700 psi). Special version up to 160 bar (2300 psi) available - in working pressure: 7 bar (100 psi) Special version for pressures as low as 3 bar (43 psi) with max working pressure 60 bar (850 psi) available - Ambient temperature: -30 to +100 C Special version for temperatures as low as -60 C available - Flow orifice nominal diameter: 9 mm Special diameters 12 and 15 mm available - Direct acting version: 0.8, 1.25 and 2.5 mm flow orifice diameters available - Available voltage supplies: 12, 24, 48, 110, 115, 125, 220 VDC 110, 120V/50Hz and 120, 240V/60Hz VAC - Solenoid insulation: class H; epoxy resin moulded coils available - Nominal power: 24W for continuos duty version (standard) 9W for low consumption requirements available Explosionproof degrees: CENELEC: EEx-d IIC T5 Factory utual: Class 1, Divisions 1 & 2, Groups C & D Class 2, Divisions 1 & 2, Groups E, F & G Class 3, Divisions 1 & 2 Temperature class: T4 Weatherproof degrees: CENELEC: IP 45 for solenoid valve stand-alone IP 67 fitted into the control unit container Factory utual: NEA 4 fitted into the control unit container Item Name Q.ty 1 Data plate 2 2 Coil cover 2 3 Coil 2 4 Gap washer 2 5 Spring pin 2 6 Exhaust plug spring 2 7 Core enclosure 2 8 O-Ring 2 9 Inlet plug pusher 2 10 Core spring 2 11 Inlet plug 2 12 Plug 4 13 Core ring nut 2 14 Inlet nozzle 2 15 Taper plug 2 16 Cover 1 17 Screw 6 18 O-Ring 2 19 Inlet seat plug 2 20 O-Ring 2 21 Piston 2 22 O-Ring 2 23 Piston ring seal 2 24 O-Ring 2 25 Piston ring seal 2 26 Back-up washer for O-Ring 4 27 O-Ring 4 28 Inlet seat 2 29 Seat lock ring nut 2 30 Index ring 1 31 Index ring 1 32 Cable terminal 1 33 Index ring 1 34 Index ring 1 35 Plug spring 2 36 O-Ring 2 37 Spring guide 2 38 Pipe lock screw 2 39 Pusher spring 2 40 Wires passage pipe 2 41 Coil lower enclosure 2 42 Exhaust plug 2 43 Coil container 2 44 Core 2 45 Exhaust nozzle 2 46 Washer 2 47 Rivet 6 48 anual override lever 2 49 anual override left thrust block 1 50 Spring pin 2 51 O-Ring 2 52 Screw 4 53 Spring washer 4 54 anual override pin 4 55 Body 1 56 Plug 2 57 anual override right thrust block 1 58 Screw 3 59 anual override spring 2 60 Plug 2 Recommended spare parts; items additionally marked with whole with the core (item 44) can only be supplied as a 5

6 Overall dimensions and mounting data Socket head cap screws 6X1 for valve fastening to the plate (socket wrench 5mm) 156 Ø60 anual override lever 184 Signal manifold (removable) 10 Actuated position Protection pipe Open - Close instruction plate 17 6 O-ring groove O-ring 2-11 ID= 7,65 W= 1, J B 110 X 11 Ø 33 DETAIL W 1,25 2 1,25 E J L F DC PC AD PO DO Copyright by BIFFI Italia. All rights reserved. C Y W O-ring groove O-ring 2-25 ID= 29,87 W= 1,78 14 Symbol of double 3/2 N.C. solenoid valve with manual override L PC = 3/2 N.C. Pilot solenoid valve, with manual override (to Close) PO = 3/2 N.C. Pilot solenoid valve, with manual override (to Open) DC = 3/2 N.C. Pneumatic pilot/spring return valve (to Close) DO = 3/2 N.C. Pneumatic pilot/spring return valve (to Open) Connections made by signals manifold DETAIL K D Ø9 Ø14 10 H F 1,25 K O-ring groove O-ring 2-13 ID=10,82 W= 1,78 View from Y (Signals manifold removed) A B C E G View from X 6 58 A = Supply port (see detail K ) B = Outlet port to close (see detail K ) C = Outlet port to open (see detail K ) D = Power exhaust port (see detail K ) E = Closing pilot valve outlet port F = Opening pilot valve outlet port G = Closing power valve pilot H = Opening power valve pilot J-L = Pilot valves exhaust ports = N 3 Ø6,5 Through holes for assembly BIFFC-0077-EN X1,25 Coil terminals N 8 8X1,25 (12mm deep) threaded holes for manifold or valves assembly n 2 leads (AWG19 cross section) Note: the connection between the port E-G and F-H is made by the signals manifold (removable) Weight = 4.8 Kg All dimensions are in mm Contents may change without notice Publisì/Grafiche Cesina/3.000/11.94 PST-CS/SV-E

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