6 minute read
Bray
These components, says Simpsons, can be tested at different temperatures with helium or methane test gas using the sniffing or vacuum method according to recognized international standards. They can also be redesigned to any given customer’s specifications to ensure application suitability. “At least 80% of all valve leakage is from the stem. Test standards are therefore focusing in this area in particular.” According to Simpson, due to the large number of potential leak sources detecting valve leaks and repairing them are not always easy. From a cost perspective alone the impact of these leaks is severe while the environmental damage is extensive. Fugitive emissions also pose a real risk to workers and local communities proximity of industrial facilities. It is therefore essential that valve manufacturers and suppliers realise the dangers around fugitive emission and take extra measures to ensure their valves have secured stem seals to prevent them from leaking hazardous gas or vapour into the environment. Simpson says the industry is working hard to come up with solutions. Typical solutions include engineered packing sets typically using PTFE or elastomer sealing rings. “Anti-extrusion elements from high modulus thermoplastic or metal is another option. Rings squeezed into a gland or ‘preset” using spring energized seals is also used.” Simpson says some manufacturers are opting to use multiple barriers to achieve low interface leakage – a move that was proving to be very successful. “It has been found that greater leak-tightness can lead to increased wear and lower endurance levels so that needs to be kept in mind. All in all, there does, however, need to be further information to clarify what industry needs are.” He said improved collaboration between the industry and valve manufacturers was critical going forward to ensure that exact needs around fugitive emission were met.
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Bray Controls Africa (Pty) Ltd
Unit 11, ABC Business Park Mastiff Rd, Linbro Business Park Sandton 2090, South Africa Telephone: +27 10 007 3222
Territory Sales Manager
Jan Hattingh +27 76 276 2062 jan.hattingh@bray.com
End of Range Items for sale
Gate Valves:
15 mm Bonney Forge A105 800# RS BB OS&Y c/w weldon ASME B16.5 150# R/F Flanges - 6 in stock
R400.00
50 mm CF8MSS RS BB OS&Y ASME B16.5 300# R/F Flanges 7 in stock
R2 000.00
OTHER
40 mm Gate Valves Smith F11 + CR13 Trim 800# BB OS&Y Socket Weld Ends - 1 in stock
R600.00
Globe Valves
40 mm “LM BRAND” WCB RS BB OS&Y ASME B16.5 150# R/F Flanges 6 in stock
R700.00
40 mm PQ CK20 RS BB OS&Y ASME B16.5 150# R/F Flanges 1 in stock
R9 800.00
Ball Valves
20 mm Hisaka CF8M 2-Piece Floating Ball ASME B16.5 150# R/F Flanges 4 in stock
R900.00
25 mm - CF8M 3-Way L-Port BSPT Screwed R200.00
40 mm - CF8M 3-Way L-Port BSPT Screwed R250.00
40 mm Bonney Forge A105 800# NRS BB OS&Y c/w weldneck ASME B16.5 150# R/F Flanges - 1 in stock
R700.00
50 mm SV SS316 RS BB OS&Y ASME B16.5 150# R/F Flanges 1 in stock
R800.00
200 mm WCB RS BB OS&Y ASME B16.5 300 Flanged and Drilled to suit SANS 1123/2500 Flanges 1 in stock - R10 000.00
Miscelaneous Valves
40 mm Tank Bottom Ball Valve CF8M Floating Ball Flanged - 1 in stock
R500.00
150 mm CF8MSS RS BB OS&Y ASME B16.5 600# R/F Flanges 1 in stock
R4 850.00
40 mm Bottom Ball Valves CF8M Floating Ball Flanged - 1 in stock
R500.00
OTHER
100 mm PQ WCB RS BB OS&Y PN16 Flanges - 1 in stock
R3 673.00
25 mm PQ CF8MSS RS BB OS&Y ASME B16.5 300# R/F Flanges 3 in stock
R1 000.00
OTHER
80 mm PQ CF8MSS RS BB OS&Y ASME B16.5 300# R/F Flanges 2 in stock
R8 000.00
40 mm Bonney Forge A105 800# RS BB OS&Y c/w weldon ASME B16.5 150# R/F Flanges - 1 in stock
R700.00
80 mm PQ 904L 2-Piece Floating Ball ASME B16.5 150# R/F Flanges - 2 in stock
R6 500.00
25 mm PQ CF8M Wafer Sampling Ball ASME B16.5 150# R/F Flanges - 1 in stock
R1 000.00
PQ Cast Iron 2-Piece Floating Ball PN10 Flanges
R1 800.00
80 mm PQ CF8M Wafer Ball ASME B16.5 150# R/F Flanges 1 in stock
R1 000.00
15 mm PQ CF8MSS RS BB OS&Y ASME B16.5 300# R/F Flanges 4 in stock
R900.00
OTHER
20 mm Gate Valve Crane A105 800# RS BB OS&Y c/w weldon ASME B16.5 150# R/F Flanges 44 in stock
R300.00
100 mm AZ Plug Valve CF8M Flanged Class 600 - 2 in stock
R7 500.00
25 mm PQ CF8MSS RS BB OS&Y ASME B16.5 600# R/F Flanges
R5 000.00
50 mm PQ WCB 2-Piece Floating Ball ASME B16.5 600# R/F Flanges - 1 in stock
R4 000.00
25 mm PQ CF8M SS ASME B16.5 600# R/F Flanges 3 in stock
R1 500.00
Various Sizes PQ Cast Iron / Aluminium Bronze / EPDM
R500.00 - R2 100.00
25 mm PQ CF8M SS ASME B16.5 600# R/F Flanges 4 in stock
R1 500.00
50 mm Crane Cast Iron PN16 R/F Flanges 2 in stock
R1 000.00
50 mm “VALPRO” A105 800psi Forged Steel S/W 1 in stock
R1 400.00
Chemline Valves
Ball Valves WCB+PTFE+PFA ASME B16.5 150# R/F Flanges - 25mm, 40mm & 100mm
R1 900.00 & R6 500.00
Butterfly Valves WCB+PTFE+PFA to suit ASME B16.5 150# R/F Flanges Various sizes
R1 700.00 R7 100.00
Plug Valves WCB+PTFE+PFA ASME B16.5 150# R/F Flanges Various sizes
R950.00 R2 200.00
Butterfly Valves 150 mm WCB+PTFE+PFA to suit ASME B16.5 150# R/F Flanges 1 in stock
R7 100.00
Polypropylene & PVDF Valves
80 mm Asahi PVC Ball valve & Safeblock PP Ball Valves
R500.00
80 mm Polypropylene Ball Check valve Screwed 5 in stock
R500.00
40 mm Asahi PVDF Ball valve 1 in stock
R250.00
25 mm Polypropylene Diaphragm valve 2 in stock
R500.00
50 mm Polypropylene Diaphragm valve 4 in stock
R500.00
15 mm PVDF Diaphragm valve - 1 in stock
R500.00
25 mm Saunders Diaphragm Check Valve Cast Iron Flanged 150# - 2 in stock
R250.00
80 mm Heaton WCB + 13Cr ASME B16.5 150# R/F Flanges 2 in stock
R2 800.00
Ball Check Valves WCB+PTFE+PFA ASME B16.5 150# R/F Flanges - Various sizes
R800.00 - R4 750.00
Butterfly Valves 300 mm WCB+PTFE+PFA to suit ASME B16.5 150# R/F Flanges 5 in stock
R12 800.00
15 mm SafeBlock Polypropylene Ball valve
R250.00
Type 21 PVC Ball Valve R250
25 mm - Socketweld Polypropylene Diaphragm valve 17 in stock
R500.00
50 mm CF8M SS Screwed End Swing Check 1 in stock
R200.00
40 mm PQ CF8M SS ASME B16.5 300# R/F Flanges 1 in stock
R1 500.00
Wafer Check Valve 25mm - WCB+PTFE+PFA to suit ASME B16.5 150# R/F Flanges 4 in stock
R300.00
OTHER
OTHER
20 mm +GF+ Type 346 Ball Valve
R300.00
80 mm SafeBlock Polypropylene Ball valve
