Safety Shut-off Valve SSV

Transcription

1 Safety Shut-off Valve SSV < Accurate operation < Compact design < Easy maintenance Applications The safety shut-off valve is designed for use in gas distribution, and pressure regulation systems. The device protects the downstream pipe against over-pressure or low-pressure failure, by automatically stopping the flow. Description The series is a direct-acting, safety shut-off valve, operated by a loading spring and a diaphragm control unit. It is fitted with an external manual reset. Technical Features Inlet pressure range up to 10 bar Over-pressure shut-off range 28 mbar to 5.6 bar Under-pressure shut-off range 5 mbar to 2.7 bar Accuracy class AG 5 to AG 30 Operating temperature -20 C to +60 C Acceptable gases Natural gas, propane, butane, air, nitrogen and all non-corrosive gases. Sizes & Connections Sizes Rp 1 Type Internal thread ISO 7-1 Materials Body Spheroidal graphite iron ISO 1083 Cover Die cast aluminium Internal parts Stainless steel and brass Type designation and options < SSV SSV XX X X Version 82 Orifice 13 mm 32 Orifice 25 mm 1 Ø Ø 90 3 Ø 90/TR 1 OPSO 2 OPSO + UPSO

2 Overall Dimensions (in mm) D B C A Spring Selection Tables SSV 8200/ Ø 120 mm head (low pressure) Over-pressure shut-off springs d De Lo It 8211 / 8212 / 8311 / mbar mbar mbar mbar Under-pressure shut-off springs d De Lo It 8212 / mbar mbar mbar mbar < SSV sensing line: Rp 1/4 with compression fitting DN 10 Spring characteristics: d : wire diameter De : external diameter Lo : height It : nber of spires Information to be specified when ordering: Model Minimum inlet pressure Maximum inlet pressure Maximum flow rate Kind of gas Quantity required Calibration level for intervention of the OPSO and UPSO (if requested) E SSV Ø 90mm and 90/TR head (medium and high pressure) Over-pressure shut-off springs D De Lo It (Ø 90) (Ø 90/TR) bar bar bar bar bar bar bar bar Under-pressure shut-off springs D De Lo It 8322 (Ø 90) 8332 (Ø 90/TR) bar bar bar bar bar bar bar bar Overall Dimensions (in mm) A B C D E 8211/ /12 (Ø 120) / /32 (Ø 90 and Ø 90 /TR) Series 8200: body lenth A is 100 mm. GA GB Copyright 2003, Actaris, All Rights Reserved. - Actaris reserves the right to change these specifications without prior notice. Actaris Gaszählerbau GmbH Hardeckstrasse 2 D Karlsruhe - Germany ERIKS bv I P.O. box 280 I 1800 BK Alkmaar I T I F I For E valves@eriks.nl more information, I tel fax

3 Safety Shut-off Valve SSV 8500 < Accurate operation < Low pressure loss < Built-in bypass < Compact design Applications The SSV 8500 safety shut-off valve is designed for commercial and industrial use: gas supply networks, district stations, industries and heating plants where ease of adjustment and fast response are required. Description The SSV 8500 is a direct acting safety shut-off device of the slam-shut type. It shuts-off the gas flow automatically and completely when the monitored pressure exceeds the pre-set values (over-pressure and/or under-pressure). The closing plug of the SSV controller is used as pulling tool to re-latch the valve. A built-in bypass, for balancing pressure before re-latching the safety shutoff valve, is operated when pulling the valve stem. Technical features Inlet pressure range up to 19 bar Over-pressure shut-off range 25 mbar to 5.6 bar Under-pressure shut-off range 9 mbar to 2.5 bar Accuracy class AG 1 to AG 30 Operating temperature -20 C to +60 C Ambient temperature -30 C to +60 C (body material) Acceptable gases Natural gas, propane, butane, air, nitrogen and all non-corrosive gases. Sizes & Connections Sizes DN 25, 40, 50 and 80 Body lengths EN face-to-face recommended dimensions Flanges Steel PN16, PN20, PN25 Cast iron PN16, PN20, PN25 Materials < SSV 8500 Body Head Internal parts Seals Spheroidal graphite cast iron EN 1563 grade EN-GJS Steel N grade G 20 Mn 5 Pressed steel /UNI EN10025 Stainless steel and brass Nitrile rubber.

4 Operational Schematic Inlet Pressure Outlet Pressure Accuracy class (AG): < Low pressure: AG 10 < Medium pressure: AG 2.5 < High pressure: AG 1 Minimal difference between regulator and SSV settings ( P w ): < Standard: 15 % with a minimum difference of 10 mbar to UPSO, 20 mbar to OPSO < High pressure: 20 % with a minimum difference of 40 mbar to UPSO, 40 mbar to OPSO 2

5 Set Range Over-pressure shut-off springs (OPSO) d De Lo It 8511/ / /32 (mm) (mm) (mm) (mm) (Ø 150) (Ø 90) (Ø 90 TR) mbar bar mbar bar mbar bar mbar bar bar bar bar , bar bar Spring characteristics: d : wire diameter De : external diameter Lo : height It : nber of spires Under-pressure shut-off springs (UPSO) d De Lo It 8511/ / /32 (mm) (mm) (mm) (mm) (Ø 150) (Ø 90) (Ø 90 TR) mbar bar mbar bar bar mbar bar bar mbar bar bar bar bar , bar Maximum inlet pressure For higher inlet pressure, the SSV 8500 is fitted with heavier closing spring which gives a positive lock-up even in case of high pressure differential across the valve. The following table indicates the maximum inlet pressure for both executions. DN Standard 6 bar 6 bar 6 bar 6 bar Heavy duty 16 bar 16 bar 16 bar 16 bar Flow coefficient For a 0.6 specific gravity gas, the following equation relates the flow (Q) and the pressure loss (DP): ( ) DP = Q 2 1 C v P e Where: Q: volumetric flow rate in m 3 /h at standard conditions P e : inlet absolute pressure in bar DN C v

6 Overall dimensions (in mm) DN D DN A B C Weight add. (mm) (mm) (mm) (kg) /4 Gas B D : actuator diameter ø 150 or ø 90 DN C A Vent and sensing lines Type designation and options Information to be specified when ordering: - Type designation - Minimum and maximum inlet pressures - OPSO setting - UPSO setting* - Connection type - Options * if requested < SSV sensing line: Rp 1/4 with compression fitting DN 10 < SSV 8500 breather line: Rp 1/8 SSV 85 X X Versions 1 ø ø 90 3 ø 90/TR 1 OPSO 2 OPSO + UPSO GA-SSV8500-EN-V Copyright 2009, Itron, All Rights Reserved. - Itron reserves the right to change these specifications without prior notice. Itron GmbH Hardeckstrasse 2 4 D Karlsruhe - Germany ERIKS bv I P.O. box 280 I 1800 BK Alkmaar I T I F I E For valves@eriks.nl more information, I tel fax

7 Safety Relief Valves SRV 801 / 811 < Compact design < Accurate operation < High-flow capacity < Reliable < Tight shut-off Applications The 801 and 811 relief valves are used downstream of pressure regulators to relief limited volumes of gas. Used where venting to atmosphere is acceptable, they provide cost effective solutions to avoid triggering safety shutoff valves in case of thermal expansion, transient surges of pressure and creep leaks from regulators. These valves are ideal for low pressure settings due to the increased sensitivity provided by a large diaphragm area. Description The 801 and 811 relief valves are springloaded throttling relief valves, where a diaphragm measures the system (inlet) pressure, a spring provides the initial load to the diaphragm and establishes the relief set point and a valve throttles the relief flow. Technical Features Maximum relief (inlet) pressure Relief set pressure range Operating temperature Acceptable gases 1.5 bar mbar -20 C to +60 C Natural gas, town gas, propane, butane, air, nitrogen or any non-corrosive gas Body Sizes and Connections Sizes DN 1 Type Gas female threaded Materials SRV 800 Body-Casing-Cover Valve Diaphragm Internal Parts Aluminium Nitrile Rubber Rubber, fabric reinforced Brass and Stainless Steel

8 Standard conditions: Absolute pressure of bar Temperature of 15 C The flow rates are indicated for a 0.6 specific gravity gas Overall Dimensions (mm) Ø 120 Flow Capacity Relief set pressure (mbar) Buildup over relief pressure setting (mbar) Capacity in standard conditions (m3/h) SRV Spring Selection Tables - DN 1 SRV 801 DN 1"Gas 1 Gas 100 <Type SRV 801 / Weight 0.8 kg Ø Gas <Type SRV 811 / Weight 1.2 kg DN 1"Gas Information to be specified when ordering: - Model - Inlet pressure - Relief pressure range - Connection Type - Maximum flow rate - Kind of gas - Quantity required Spring Characteristics Wh (mbar) Maximum available relief Code d De Lo It (inlet) pressure mbar SRV 811 Spring Characteristics Wh (mbar) Maximum allowable relief Code d De Lo It (inlet) pressure mbar SRV 811/TR Note: Accuracy on the initial leak point, at which the relief valve begins to discharge, is in the range of ± 5 % of the setting. Options SRV 811 may be fitted with pressure tap (coupling Ermeto 8) for system (inlet) pressure indicator - Code: SRV 811/I or SRV 811/I/TR. Spring Characteristics Wh (mbar) Maximum allowable relief Code d De Lo It (inlet) pressure mbar d: wire diameter De: external diameter Lo: free load height It: nb. of turns SRV 811 may be fitted with valve disk downstream to the flow, which reduces the popping effect and allows a smooth throttling of the flow - Code: SRV 811/A or SRV 811/A/TR. GA GB-O Copyright 2002, Actaris, All Rights Reserved. - Actaris reserves the right to change these specifications without prior notice. Actaris Gaszählerbau GmbH Hardeckstrasse 2 D Karlsruhe - Germany ERIKS bv I P.O. box 280 I 1800 BK Alkmaar I T I F I For E valves@eriks.nl more information, I tel fax