High Performance Butterfly Valve

FEATURES

· Self-sealing mechanism ensures a tight shut-off

As illustrated below, fluid pressure to the disc and seat ring ensures a secure seal. The higher the pressure, the better the sealing performance. The sealing performance remains uncharged even when the flow direction changes from one way to the other.

· Double eccentric disc ensures longer service life, low seating torque and leak-tight shut-off.

Since the stem is eccentric from the seat ring (as indicated by A and B), the disc has contact to the seat ring only when the valves is completely closed. Here are benefits from the double eccentric disc design.

1. Less wear of the seat ring offers longer service life of the seat ring.
2. When the disc closes, the disc pushes the seat ring outward and ensures perfect sealing.
3. Easy operation with less seating torque.
4. Easy replacement of the seat ring without removing the stem, thanks to the design of the stem not penetrating through the seat ring.

· Compact, lightweight, and cost-effective

Employing the thin wafer body, the YADB-122E1 series is significantly smaller and lighter than gate valves or ball valves, and piping works can be greatly simplified.

· Eccentric disc

- Extending seat service life

- Providing smooth and even touch

- Improving sealing

- Eliminating friction

- Reducing operating torque

SPECIFICATION

Model No.			YADB-122E1 Series, YABB-122E1 Series
Valve Type			Diaphragm & Cylinder actuator operated high-performance butterfly valve.
BODY	Valve Size	(mm)	50	65	80	100	125	150	200	250	300	350	400	450	500	550	600	650	700	750	800	850	900	1000	1100	1200
	Valve Size	(inch)	2	2 ½	3	4	5	6	8	10	12	14	16	18	20	22	24	26	28	30	32	34	36	40	44	48
	Pressure Rating		ANSI 150# ~ 300# / JIS 10K ~ 20K / JPI 150# ~ 300# / PN 6bar ~ 25bar
	End Connections		FLANGES , WAFER , B.W
	Body Materials		A216-WCB, A351-CF8, CF8M, CF3M
	Operating Temperature	Soft seat	-45°C ~ +180°C (PTFE, RTFE) , # -196°C(PCTFE), +250°C(PEEK)
	Operating Temperature	Metal seat	Max 450°C (SUS304, SUS316, SUS316L)
	Guide		Top & Bottom guide
	Gland Packing		PTFE yarn, Graphite yarn
	Gland type		Bolted gland
	Painting Color		Standard is silver. In the case of stainless steel, flange is not painted.
	Disc Characteristics		Modify EQ %, Quick opening
	Flow Direction		Direct
PERFORMANCE	Valve Action		Direct action, Reverse action.
	Allowable Differential Press.		See “ALLOWABLE PRESSURE DROP” page 7
	Rated Cv Value		See “FLOW CHARACTERISTICS” page 6, 7
	Flow Characteristics		See “FLOW CHARACTERISTICS” page 6
	Rangeability		20:1
	Allowable Seat Leakage Ratio	Soft Seat	ANSI B16. 104 Class VI
	Allowable Seat Leakage Ratio	Metal Seat	ANSI B16. 104 Class III ※ ANSI B16.104 CLASS Ⅳ
	Action Accuracy	Hysteresis	(Without positioner) max. 5% F.S. (With positioner) max. 2% F.S.
	Action Accuracy	Linearity	(Without positioner) max. ±6% F.S. (With positioner) max. ±2% F.S.
ACTUATOR	Model		DB-240, DB-300, DB-400, DB-520												B0S(R) ~ R12S
	Actuator Type		Single acting diaphragm operated.												Rotary cylinder actuator (Double, Single)
	Actuator Size		Ø240 ~ Ø520												Ø50 ~ Ø400
	Max. Stroke (mm)		60°, 90°												90°
	Supply Air Pressure kPa (kgf/cm²G)		160 (1.6), 320 (3.2)												500~700 (5.0~7.0)
	Spring Range kPa (kgf/cm²G)		60~100 (0.6~1.0), 120~200 (1.2~2.0)												Single: 200~350 (2.0~3.5) Double: 400~400 (4.0~4.0)
	Materials		Diaphragm: EPDM												Piston O-ring: N.B.R or VITON
	Air Connection		Rc 1/4												Rc 1/4 ~ Rc 1
	Ambient Temperature		-20°C ~ +70°C (※-20°C ~ +100°C)												-10°C ~ +70°C (※ 0°C ~ +100°C)
	Painting Color		Standard is Cobalt Blue(Munsell No : 2.5 PB3/10 ) [ Request other color ]												Standard is red. [ Request other color ]

[Notes]
(1) Valve performance is represented under the condition of standard packing (PTFE yarn).
(2) ※: Manufactured and attached as according to customer’s order.

DOCUMENTS & DRAWINGS

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