SCH8O/DIN UPVC/CPVC Pneumatic Butterfly Valve

The pneumatic butterfly valve adopts a wafer-type design with a compact structure, small size, and lightweight design, making it convenient to install, transport, and maintain. It is driven by a pneumatic actuator that rotates the valve stem, enabling the disc to rotate quickly within the valve body by 90°, achieving rapid opening and closing with fast response. It precisely controls flow according to system requirements, providing stable and reliable throttling, cutoff, and isolation functions. The valve uses elastic sealing materials such as rubber or PTFE to ensure effective leakage prevention when closed. The pneumatic butterfly valve is suitable for various media such as water, oil, and steam and operates within a wide range of pressures and temperatures, meeting the demands of different piping systems.

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パラメータ応用技術基準

(1) Material: UPVC, CPVC
(2) Size: 2"-12", DN50-DN300, dn63-dn315
(3) Standards: ANSI, DIN
(4) Connection: flange
(5) Work pressure: 150PSI, 1.0MPa
(6) Operating temperature: UPVC(-10°C-60°C), CPVC(-10°C-90°C)
(7) Minimum air pressure: 45PSI, 0.4MPa
(8) Body color: UPVC (dark gray), CPVC (light gray)

SIZE/NOM.		dn63	dn75	dn90	dn110	dn140	dn160	dn225	dn280	dn315
		(DN50)	(DN65)	(DN80)	(DN100)	(DN125)	(DN150)	(DN200)	(DN250)	(DN300)
		(2")	(2-1/2")	(3")	(4")	(5")	(6")	(8")	(10")	(12")
D1		160	180	196	228	258	287	344	411	490
D2	DIN	125	145	160	180	210	240	295	350	400
	ANSI	121	140	152	191	216	241	298	362	346
	JIS	120	140	150	175	210	240	290	355	400
N-Φ	DIN	4-Φ18	4-Φ18	8-Φ18	8-Φ18	8-Φ18	8-Φ22	8-Φ22	8-Φ22	12-Φ22
	ANSI	4-Φ19	4-Φ19	4-Φ19	4-Φ19	8-Φ22	8-Φ22	8-Φ22	12-Φ25	12-Φ25
	JIS	4-Φ19	4-Φ19	8-Φ19	8-Φ19	8-Φ23	8-Φ23	12-Φ23	12-Φ25	16-Φ25
H1		100	110	132	155	167	180	225	260	280
W1		43	46	49	54	64	70	88	98	108
Torque (N · M)		10	10	15	22	40	45	65	-	-

Actuator working mode double-acting/single-acting (NC normally closed, NO normally open)

Specification	63	75	90	110	140	160	225	280	315
Specification	2"	2 1/2"	3"	4"	5"	6"	8"	10"	12"
Controlling stress	4~8
NAMUR standard air source interface	G 1/4"
Double acting actuator models	TBN052D	TBN063D	TBN075D	TBN083D	TBN092D	TBN105D	TBN7105D	TBN125D	TBN140D
Single acting actuator models	TBN063SK	TBN075SK	TBN083SK	TBN092SK	TBN105SK	TBN125SK	TBN125SK	TBN140SK	TBN160SK

SCH80 / DIN · PNEUMATIC · WAFER/LUG

UPVC / CPVC Pneumatic Butterfly Valve

Double-acting · Spring-return · Liner sealed · ISO 5211

The SCH80/DIN UPVC/CPVC Pneumatic Butterfly Valve is an automated quarter-turn flow control device engineered for on-off and throttling service in corrosive and high-purity fluid systems. Manufactured to ASTM SCH80 and DIN standards, this valve integrates a pneumatic actuator with a wafer or lug-style butterfly valve body. The actuator is available in double-acting or spring-return configurations, providing fail-safe positioning. The resilient liner — available in EPDM, PTFE, or Viton — provides bubble-tight shut-off across the full pressure range. The wafer and lug configurations allow for dead-end service and easy installation between standard flanges. The actuator mounting follows ISO 5211 standards. This valve is widely used in automated process control, chemical dosing, water treatment, and industrial manufacturing systems requiring lightweight, compact, and cost-effective flow control.

DN40–DN300 Size range

PN10–PN16 Pressure rating

–20°C to 93°C CPVC range

ISO 5211 Mounting pad

Liner Sealing

The replaceable EPDM, PTFE, or Viton liner provides a tight seal around the disc and flange faces, eliminating leakage paths and simplifying maintenance.

Automated Operation

Double-acting or spring-return actuators enable remote control, process automation, and fail-safe positioning without operator intervention.

Chemical Compatibility

UPVC and CPVC bodies resist a broad spectrum of acids, bases, and salts. Liner material can be selected to match specific chemical exposure.

Throttling Capability

The butterfly design allows for precise flow modulation across the 0–90° rotation range, providing control flexibility beyond simple on-off service.

Valve Specifications

Body UPVC · CPVC

Disc Solid UPVC/CPVC · Coated ductile iron

Liner EPDM · PTFE · Viton (FKM)

Connection Wafer · Lug (DIN/ANSI drilling)

Standards ASTM D2467 · DIN 8061/8062 · ISO 16136

Actuator Data

Type Double-acting · Spring-return

Supply pressure 4–8 bar

Mounting ISO 5211 · Direct mount

Rotation 90° · Adjustable stroke

Accessories Positioner · Limit switches · Solenoid

Actuator sizing depends on valve torque and supply pressure. Consult factory for selection.

Application Areas

Chemical Acid transfer · Caustic dosing · Reactor feed

Semiconductor UPW distribution · Chemical delivery · Wet benches

Energy Battery electrolyte · Cooling water · Solar etching

Water Wastewater · RO permeate · Desalination · Discharge

Pharma DI water loops · CIP systems · Sanitary lines

Automotive Paint circulation · Parts washing · Coolant

Installation Guidelines

Wafer installation: Center the valve between flanges. Use appropriate flange bolts and nuts. Tighten evenly in a cross pattern.
Lug installation: Bolt directly to one flange for dead-end service. Use full-face gaskets on both sides.
Disc positioning: The disc should be in the closed position during installation to avoid damage to the liner.
Air supply: Filtered, lubricated air at 4–8 bar. Use solenoid valve for remote control.
Actuator mounting: Ensure ISO 5211 mounting pad alignment. Use correct coupling and bracket.
Testing: Cycle valve manually and pneumatically before placing in service.

Critical Restrictions

Temperature: UPVC 60°C max · CPVC 93°C max · Do not exceed liner rating.
Air pressure: Do not exceed 8 bar supply pressure. Actuator torque increases with pressure.
Not rated for steam service. Avoid rapid thermal cycling and pressure surges.
Do not use EPDM liner with hydrocarbon solvents, oils, or strong oxidizers.
PTFE liner has limited abrasion resistance — not recommended for slurries with high solids content.
UV exposure: Use UV-stabilized material or apply protective coating.
Do not operate the valve in the 5–85% open range for extended periods in abrasive media.

Frequently Asked Questions

What is the difference between wafer and lug styles?

Wafer style is installed between two flanges and held in place by flange bolts. It is lightweight and cost-effective. Lug style has threaded inserts on both sides, allowing the valve to be bolted directly to one flange for dead-end service and isolation of downstream piping.

How do I select the correct liner material?

EPDM is suitable for water, mild acids, and alkalis up to 80°C. PTFE is recommended for aggressive chemicals, solvents, and high-purity applications up to 93°C. Viton (FKM) is used for hydrocarbons, oils, and strong oxidizers up to 90°C. Always verify compatibility with your specific process chemistry.

Can this valve be used for throttling control?

Yes, with a positioner and appropriate control signal (4–20 mA or 0–10 V). The pneumatic actuator provides proportional positioning, enabling accurate flow control. However, throttling service may reduce liner life compared to on-off service.

What accessories are recommended?

Common accessories include solenoid valves for remote on-off control, positioners for throttling, limit switches for position feedback, and filter-regulator-lubricator units for air preparation. Accessory selection depends on the application and control system requirements.

会社

Zheyi Pipeline（Wuhan）Co.、Ltd。

ZHEYI Group はい中国 SCH8O/DIN UPVC/CPVC Pneumatic Butterfly Valve 食品産業/自動車/電子用サプライヤーそしてカスタムメイド SCH8O/DIN UPVC/CPVC Pneumatic Butterfly Valve 食品産業/自動車/電子用工場. 当社は2007年に設立され、CPVCおよびUPVC工業用パイプの研究開発、製造、販売、サービスに注力しています。特殊設備製造許可証、浙江省水関連製品衛生許可証、ISO9001品質マネジメントシステム認証、IS014001環境マネジメントシステム認証、IS045001労働安全衛生マネジメントシステム認証など、数多くの認証を取得しています。50件以上の自主知的財産権と自社運営の輸出入権を有しています。多様な製品とより良いサービスを提供するために、ドイツとアメリカの先進的な技術、工具設備、独自の原材料と管理システムを導入しています。長年にわたり、当社の製品は化学、冶金、太陽光発電、原子力、リチウム電池、電子半導体、食品、医薬品、自動車、工業用水処理などの業界において、酸・アルカリ液、超純水、飲料水、電子グレード純水、産業廃水のパイプライン輸送に広く利用されています。現在、ZHEYIグループは全国に30社以上の販売会社を設立しており、各種製品はヨーロッパ、アメリカ、東南アジアなどの国と地域に輸出されており、国内外の顧客から深い好評を得ています。

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当社は、日本の積水化学やアメリカのルーブリゾールなど、最先端の生産設備と高品質の材料を使用しています。「ZHEYI」は、精巧な生産技術と専門的な管理体制を完璧に融合させ、すべての製品は製造から検査、最終出荷に至るまで厳格な品質管理を受けており、外観と機能の完璧な融合を保証しています。
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SCH8O/DIN UPVC/CPVC Pneumatic Butterfly Valve 業界知識

Selection Guide for Pneumatic Butterfly Valves in Industrial Automation: How to Match Pressure, Temperature and Media?

In industrial automation systems, pneumatic butterfly valves are widely used in multiple industries due to their fast response, compact structure and easy control. However, different industries have different requirements for valve pressure, temperature and media compatibility. Improper selection may lead to valve failure, leakage or shortened life. The following are key selection points for different industries:

1. Pressure level matching
Pneumatic butterfly valves need to select appropriate design pressures (such as PN10, PN16, ANSI 150, etc.) according to the system working pressure:
Photovoltaic, Electronic Semiconductor: Usually low pressure (PN6~PN10), used for ultrapure water or gas delivery.
Metallurgy, Nuclear Power: Medium and high pressure (PN16~PN40), need to resist impact pressure, especially high temperature and high pressure steam or corrosive fluids.
Industrial Wastewater, Drinking Water: Normal pressure to medium pressure (PN10~PN16), water hammer effect needs to be considered.

2. Temperature adaptability
The valve body material (such as cast iron, stainless steel, fluorine lining) and sealing material (EPDM, PTFE, NBR) need to match the medium temperature:
Medicine, semiconductor: low temperature or normal temperature (-20°C~120°C), sterile grade materials (such as 316L stainless steel PTFE seal) are required.
Metallurgy, nuclear energy: high temperature (200°C~500°C), metal hard seal or special alloy valve body is required.
Photovoltaic: may involve extreme temperature difference, and weather-resistant materials are required.

3. Medium compatibility
The corrosiveness and particulate content of the medium determine the valve material and sealing solution:
Drinking Water, Industrial Water Treatment: requires no pollution, and EPDM or FDA-certified sealing materials are selected.
Industrial wastewater: containing acid, alkali or solid particles, requires fluorine lining (PTFE) or wear-resistant rubber seal.
Electronic semiconductor: ultrapure water or high-purity gas, the inner wall of the valve needs to be electrolytically polished to avoid particle precipitation.
Nuclear energy: radioactive media require all-metal sealing valves with special certification (such as ASME N grade).

Industry application examples
Photovoltaic: low-pressure and room-temperature ultrapure water transportation, emphasizing zero leakage and long life.
Metallurgy: high temperature and high dust environment, valves need to be wear-resistant and anti-stuck.
Medicine: high sterility requirements, valves need to be easy to clean (CIP/SIP compatible).
Nuclear energy: under extreme working conditions, valves need to meet seismic and radiation protection standards.

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