What is the difference between Model 1078 and 1078B?

Model 1078 features an SG Iron disc (epoxy coated), while Model 1078B comes with a Stainless Steel 304 (CF8) disc. The SS disc variant is preferred for better corrosion resistance or cleaner water applications. SS 316 (CF8M) disc is available at extra cost.

Can this valve be used for steam or hot water above 90°C?

No. The maximum working temperature for these valves is 90°C due to the rubber lining material. For higher temperatures, consider valves with metal-seated or high-temperature elastomer options.

Which flange standards are compatible with these wafer butterfly valves?

These valves can be sandwiched between flanges conforming to BS 10 Table D/E/F/H, DIN PN 10/16/25/40, ASA 150/300, IS 778, IS 6392 Table 17, and IS 1538.

When should I choose gear-operated over lever-operated valves?

Lever operation is standard for sizes 40mm to 150mm and is suitable for quick on/off control. For sizes 200mm and above, gear operation is recommended as it provides better torque control and easier actuation for larger valves.

Are limit switches and padlock arrangements available?

Yes, limit switches (Non-ISI) and padlock arrangements can be supplied at nominal extra cost. These are useful for

ZOLOTO · BUTTERFLY VALVES

Zoloto Butterfly Valve Wafer Type PN 1.6 – SG Iron & SS 304 Disc – Lever & Gear Operated

Name: Zoloto Butterfly Valve Wafer Type PN 1.6 – SG Iron & SS 304 Disc – Lever & Gear Operated
Brand: Zoloto

Zoloto wafer type butterfly valves PN 1.6 with SG Iron or SS 304 disc. Lever & gear operated. Ideal for water applications in industrial plants.

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Overview

The Zoloto wafer type butterfly valve (Model 1078 series) is a robust flow control solution designed for industrial water applications. Manufactured to IS 13095 / BS EN 593 (BS 5155) standards, these valves feature a compact wafer design that sandwiches between pipe flanges, making them suitable for space-constrained installations.

The valve body is constructed from SG Iron (IS 1865 Gr. 400/15) with disc options in either epoxy-coated SG Iron or Stainless Steel (CF8 / CF8M). The two-piece stem design uses stainless steel precisely guided between PTFE or bronze bushes, ensuring reliable operation. An integrally moulded rubber lining (EPDM, Nitrile, or optional Neoprene/Viton/Silicon) serves as the primary seal for the disc, stem, and flange gasket joint.

Available in lever-operated versions for smaller sizes (40mm–150mm) and gear-operated versions for larger sizes (200mm–600mm), these butterfly valves are compatible with multiple flange standards including BS 10, DIN PN 10/16/25/40, ASA 150/300, IS 778, IS 6392, and IS 1538.

Key Features

Design Standard: IS 13095 / BS EN 593 (BS 5155)
Wafer type construction – compact, lightweight, easy installation between flanges
SG Iron body with epoxy-coated SG Iron disc or SS 304 (CF8) / SS 316 (CF8M) disc options
Two-piece stainless steel stem guided by PTFE or bronze bushes for smooth operation
Integrally moulded rubber lining – EPDM or Nitrile standard; Neoprene, Viton, Silicon available
Multi-standard flange compatibility – BS 10, DIN, ASA, IS standards
Optional accessories: Limit switch (Non-ISI), padlock arrangement, gear operator

Specifications

Parameter	PN 1.6	PN 1.0 (Sizes >400mm)
Shell Test Pressure (Hydrostatic)	2.4 MPa	1.5 MPa
Seat Test Pressure (Hydrostatic)	1.76 MPa	1.1 MPa
Maximum Working Pressure	1.6 MPa	1.0 MPa
Maximum Working Temperature	90°C	90°C
Size (Inches)	Size (mm)	Face-to-Face A (mm)	Bore ØB (mm)
1½	40	33 ±1.5	40.6
2	50	43 ±1.5	52.4
2½	65	46 ±1.5	67
3	80	46 ±1.5	81.3
4	100	52 ±1.5	101
5	125	56 ±1.5	127.1
6	150	56 ±1.5	151
Size (Inches)	Size (mm)	Face-to-Face A (mm)	Bore ØB (mm)
8	200	60 ±2	201.6
10	250	68 ±2	252.2
12	300	78 ±2	301.3
14	350	85 ±3	352
16	400	96 ±3	393.8
18	450	108 ±3	442
20	500	127 ±4	504.2
24	600	146.5 ±4	593
Component	Material	Specification
Body	SG Iron	IS 1865 Gr. 400/15
Disc (Standard)	SG Iron (Epoxy Coated)	IS 1865 Gr. 400/15
Disc (SS Option)	Stainless Steel CF8 / CF8M	IS 3444 Gr. 1 / ASTM A351
Upper & Lower Stem	Stainless Steel	IS 6603 Gr. 12Cr12
Bush	PTFE / Bronze	IS 318 Gr. LTB 2 (Bronze)
Body Lining	EPDM / Nitrile	IS 5192-1
O-Ring	Nitrile Rubber	IS 5192-1

Applications

Zoloto wafer type butterfly valves are suitable for:

- Water treatment plants – raw water intake, treated water distribution - HVAC systems – chilled water and cooling water circuits - Fire protection systems – isolation and flow control - Industrial utilities – process water, cooling towers, pump discharge lines - Manufacturing plants – textile, paper, food processing, pharmaceuticals (water services) - Power plants – auxiliary cooling water systems

Frequently Asked Questions

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