Economy Pattern Concentric Butterfly Valve

Connection Type Wafer type (flangeless) for mounting between standard flanges
Flow Direction Bi directional
Disc Design Concentric disc with central stem, reducing turbulence and pressure drop
Sealing One piece moulded EPDM seat provides drop tight shut off (zero leakage) and compensates for minor disc misalignment
Stem Design Anti blowout stem with square drive top; lower stem bearing reduces friction and wear
Actuator Mounting ISO 5211 top flange for direct mounting of manual levers, gear operators, or actuators
Maintenance Simple, low maintenance design with field replaceable seat

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Economy Pattern Concentric Butterfly Valve

Ductile Iron Body · CF8M Disc · EPDM Seat

PRODUCT DESCRIPTION

The Economy Pattern Concentric Butterfly Valve is a cost‑effective, resilient‑seated quarter‑turn valve designed for reliable on‑off and basic throttling service in general industrial and municipal applications. Featuring a concentric disc design with a ductile iron body, a stainless steel CF8M disc, and a moulded EPDM seat, this valve provides bubble‑tight shut‑off, low pressure drop, and long service life at an economical price point.

Its compact wafer‑type construction and lightweight design simplify installation between flanges, while the EPDM seat offers excellent resistance to water, wastewater, diluted acids, and mild chemicals. This valve is an ideal choice for HVAC, irrigation, water treatment, and process systems where cost efficiency is a priority without compromising fundamental performance.

디자인 특징

Feature	설명
밸브 유형	Concentric (centric) disc, resilient seated butterfly valve
Connection Type	Wafer‑type (flangeless) for mounting between standard flanges
Flow Direction	Bi‑directional
Disc Design	Concentric disc with central stem, reducing turbulence and pressure drop
밀봉	One‑piece moulded EPDM seat provides drop‑tight shut‑off (zero leakage) and compensates for minor disc misalignment
Stem Design	Anti‑blowout stem with square drive top; lower stem bearing reduces friction and wear
Actuator Mounting	ISO 5211 top flange for direct mounting of manual levers, gear operators, or actuators
Maintenance	Simple, low‑maintenance design with field‑replaceable seat

TECHNICAL SPECIFICATIONS

3.1 General Parameters

매개변수	사양
Size Range	DN40 – DN600 (1½” – 24″)
Pressure Ratings	PN10 / PN16 / Class 150
설계 표준	EN 593, ISO 5752, API 609, ASME B16.34
Face‑to‑Face Dimensions	ISO 5752 Series 20 / EN 558 Series 20 / API 609 Table 1
Flange Accommodation	DIN PN10/PN16, ASME Class 150, JIS 10K, BS 4504 PN10/PN16
Top Flange	ISO 5211 (multiple sizes)

3.2 Operating Conditions

매개변수	사양
Maximum Working Pressure	1.6 MPa (16 bar) at ambient temperature
Maximum Pressure (Class 150)	285 PSI @ 100°F (non‑shock)
Operating Temperature (Valve)	-10°C to +90°C (EPDM seat, continuous)
Peak Temperature (EPDM)	+120°C (intermittent)
Minimum Temperature	-10°C (EPDM)
Flow Velocity (Limit)	Up to 5 m/s (fully open, continuous service)

MATERIAL SPECIFICATION

요소	재료	Grade / Standard
몸	Ductile Iron (DI)	ASTM A536 Gr. 60‑40‑18 / EN‑GJS‑400‑15
디스크	Stainless Steel CF8M	AISI 316 (ASTM A351 CF8M)
Stem / Shaft	Stainless Steel 416 / 420	AISI 416 (hardened)
Seat (Liner)	EPDM (Ethylene Propylene Diene Monomer)	Moulded‑in type, vulcanised
O‑Ring	NBR (Buna‑N) or EPDM	—
Bearing	PTFE‑coated bronze / POM	—
Top Flange	Ductile Iron (integral with body)	—

Optional seat materials: NBR (nitrile), Viton® (FKM), Silicone – available on request.

PERFORMANCE & TESTING

Test	Requirement
Body Shell Test	1.5 × rated pressure (hydraulic), no visible leakage
Seat Leak Test	1.1 × rated pressure (pneumatic or hydraulic)
Allowable Seat Leakage	Rate A – zero leakage (bubble‑tight) per API 598 / JIS B 2003
Bi‑directional Sealing	100% tight shut‑off in both flow directions
Cycle Life	≥ 50,000 cycles (under rated conditions)
Fire‑safe Design	Available as an option

DIMENSIONS (Typical – Wafer Type)

All dimensions are for reference. Consult factory for certified drawings.

DN	Face‑to‑Face (mm)	Approx. Weight (kg)
40	33	1.2
50	43	1.8
65	46	2.5
80	46	3.5
100	52	4.8
125	56	6.5
150	56	8.5
200	60	13.0
250	68	20.0
300	78	30.0
350	78	42.0
400	102	58.0
450	114	75.0
500	127	95.0
600	154	135.0

Face‑to‑face per ISO 5752 Series 20 / EN 558‑1 Series 20.

APPLICATIONS

Potable and raw water distribution
Wastewater and sewage treatment
HVAC (heating, ventilation, air‑conditioning)
Irrigation and agricultural systems
Fire protection systems
Cooling water and industrial process lines
Food and beverage (with compatible seat material)
Pneumatic conveying and light slurry services

OPTIONS & CUSTOMIZATIONS

Option	Details
Seat Materials	NBR, Viton® (FKM), PTFE, Silicone
Disc Materials	Ductile iron with nylon/epoxy coating, aluminum bronze
Stem Materials	Stainless Steel 304, 17‑4PH, Monel
End Connections	Wafer (standard), Lug‑type, Flanged
작업	Manual lever, worm gear operator, electric actuator, pneumatic actuator, hydraulic actuator
Coating	Epoxy coating (minimum 250 µm) for corrosion protection
Insulation	Thermal insulation jacket for extreme temperatures

APPLICABLE STANDARDS

기준	설명
EN 593	Industrial valves – Butterfly valves
ISO 5752	Face‑to‑face and centre‑to‑face dimensions
API 609	Butterfly valves: wafer, lug, and double‑flanged
ASME B16.34	Valves – Flanged, threaded, and welding end
ISO 5211	Actuator mounting interfaces
API 598	Valve inspection and testing
MSS SP‑67	Butterfly valves
NSF/ANSI 61 & 372	Potable water applications (with EPDM seat and appropriate coatings)

This technical data sheet is provided for general reference only. Specifications are subject to change without notice. For specific project requirements, please consult the manufacturer or our technical support team.

보증:

SAVVY VALVES는 탁월한 제품 품질과 안심할 수 있는 애프터서비스를 제공하기 위해 최선을 다하고 있습니다. 당사 밸브는 최소 12개월의 서비스 수명을 보장하며, 이 기간 동안 필요한 모든 예비 부품과 자세한 유지보수 지침을 무상으로 제공합니다. 보증 기간 내에 인위적인 손상이 아닌 다른 원인으로 인한 손상이 발생할 경우, 무상으로 부품을 교체하고 전문 기술 지원을 제공합니다. 보증 기간이 만료된 후에는 예비 부품 비용만 지불하시면 되며, 할인된 유지보수 서비스 혜택도 누리실 수 있습니다. 당사의 목표는 신뢰할 수 있는 품질과 포괄적인 애프터서비스를 통해 고객의 운영 비용을 절감하고 생산 효율성을 향상시키는 것입니다. 기술 문의나 유지보수가 필요하시면 언제든지 전문가 팀이 신속하게 대응하여 밸브 시스템이 항상 최적의 성능을 유지하도록 보장합니다.