Spectacle Blind Can Replace The Equipment In The Pipeline For Maintenance

Spectacle blind is a special-shaped blind plate named after its appearance resembling the number 8. Half of it is a solid blind plate used to seal the pipeline system, while the other half is a circular ring used to connect the pipeline system. It is suitable for occasions where temporary blocking or maintenance of the pipeline system is required, and can be used for pressure testing, cleaning, inspection, or equipment replacement of the pipeline system.

Made of stainless steel, duplex steel, or special alloy steel, it has excellent corrosion resistance and can withstand the erosion of corrosive media such as oxidation, acidity, alkalinity, and salt solutions.

Pressure range: 150CL–9000CL, PN10–PN160

Specifications
Functions
Video

Specification

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Spectacle blind installation dimensional drawing

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Table 1: Spectacle Blind Dimensions
Pressure	NPS	Inside Diameter, B, mm(in.)	Outside Diameter, O, mm(in.)	Centerline Dimension, A, mm(in.)	Thickness, t, mm(in.)	Web Width, W, mm (in )
Class 150	1/2	16(0.62)	45(1.75)	60(2.38)	3.0(0.12)	38(1.50)
	3/4	21(0.82)	54(2.12)	70(2.75)	3.0(0.12)	38(1.50)
	1	27(1.05)	64(2.50)	80(3.12)	3.0(0.12)	38(1.50)
	1-1/4	42(1.66)	73(2.88)	90(3.50)	6.4(0.25)	38(1.50)
	1-1/2	48(1.90)	83(3.25)	100(3.88)	6.4(0.25)	38(1.50)
	2	61(2.38)	102(4.00)	120(4.75)	6.4(0.25)	51(2.00)
	2-1/2	73(2.88)	121(4.75)	140(5.50)	6.4(0.25)	51(2.00)
	3	89(3.50)	133(5.25)	150(6.00)	6.4(0.25)	64(2.50)
	3-1/2	102(4.00)	159(6.25)	175(7.00)	9.7(0.38)	64(2.50)
	4	114(4.50)	171(6.75)	190(7.50)	9.7(0.38)	64(2.50)
	5	141(5.56)	194(7.62)	215(8.50)	9.7(0.38)	76(3.00)
	6	168(6.62)	219(8.62)	240(9.50)	12.7(0.50)	76(3.00)
	8	219(8.62)	276(10.88)	300(11.75)	12.7(0.50)	76(3.00)
	10	273(10.75)	337(13.25)	360(14.25)	15.7(0.62)	102(4.00)
	12	324(12.75)	406(16.00)	430(17.00)	19.1(0.75)	102(4.00)
	14	356(14.00)	448(17.62)	475(18.75)	19.1(0.75)	108(4.25)
	16	406(16.00)	511(20.12)	540(21.25)	22.4(0.88)	108(4.25)
	18	457(18.00)	546(21.50)	580(22.75)	25.4(1.00)	114(4.50)
	20	508(20.00)	603(23.75)	635(25.00)	28.4(1.12)	121(4.75)
	24	610(24.00)	714(28.12)	750(29.50)	31.8(1.25)	140(5.50)
Class 300	1/2	16(0.62)	51(2.00)	65(2.62)	6.4(0.25)	38(1.50)
	3/4	21(0.82)	64(2.50)	80(3.25)	6.4(0.25)	38(1.50)
	1	27(1.05)	70(2.75)	90(3.50)	6.4(0.25)	38(1.50)
	1-1/4	42(1.66)	79(3.12)	100(3.88)	6.4(0.25)	38(1.50)
	1-1/2	48(1.90)	92(3.62)	115(4.50)	6.4(0.25)	38(1.50)
	2	61(2.38)	108(4.25)	125(5.00)	9.7(0.38)	51(2.00)
	2-1/2	73(2.88)	127(5.00)	150(5.88)	9.7(0.38)	51(2.00)
	3	89(3.50)	146(5.75)	170(6.62)	9.7(0.38)	64(2.50)
	3-1/2	102(4.00)	162(6.38)	185(7.25)	12.7(0.50)	64(2.50)
	4	114(4.50)	178(7.00)	200(7.88)	12.7(0.50)	64(2.50)
	5	141(5.56)	213(8.38)	235(9.25)	15.7(0.62)	76(3.00)
	6	168(6.62)	248(9.75)	270(10.62)	15.7(0.62)	76(3.00)
	8	219(8.62)	305(12.00)	330(13.00)	22.4(0.88)	76(3.00)
	10	273(10.75)	359(14.12)	385(15.25)	25.4(1.00)	102(4.00)
	12	324(12.75)	419(16.50)	450(17.75)	28.4(1.12)	102(4.00)
	14	356(14.00)	483(19.00)	515(20.25)	31.8(1.25)	108(4.25)
	16	406(16.00)	536(21.12)	570(22.50)	38.1(1.50)	108(4.25)
	18	457(18.00)	594(23.38)	630(24.75)	41.1(1.62)	114(4.50)
	20	508(20.00)	651(25.62)	685(27.00)	44.5(1.75)	121(4.75)
	24	610(24.00)	772(30.38)	810(32.00)	50.8(2.00)	140(5.50)
Class 600	1/2	16(0.62)	51(2.00)	65(2.62)	6.4(0.25)	38(1.50)
	3/4	21(0.82)	64(2.50)	80(3.25)	6.4(0.25)	38(1.50)
	1	27(1.05)	70(2.75)	90(3.50)	6.4(0.25)	57(2.25)
	1-1/4	37(1.44)	79(3.12)	100(3.88)	9.7(0.38)	57(2.25)
	1-1/2	43(1.68)	92(3.62)	115(4.50)	9.7(0.38)	67(2.62)
	2	55(2.16)	108(4.25)	125(5.00)	9.7(0.38)	57(2.25)
	2-1/2	67(2.64)	127(5.00)	150(5.88)	12.7(0.50)	67 (2.62)
	3	83(3.26)	146(5.75)	170(6.62)	12.7(0.50)	67 (2.62)
	3-1/2	96(3.76)	159(6.25)	185(7.25)	15.7(0.62)	76(3.00)
	4	108(4.26)	191(7.50)	215(8.50)	15.7(0.62)	76(3.00)
	5	135(5.30)	238(9.38)	265(10.50)	19.1(0.75)	86(3.38)
	6	162(6.36)	264(10.38)	290(11.50)	22.4(0.88)	86(3.38)
	8	212(8.33)	318(12.50)	350(13.75)	28.4(1.12)	95(3.75)
	10	265(10.42)	397(15.62)	430(17.00)	35.1(1.38)	105(4.12)
	12	315(12.39)	454(17,88)	490(19.25)	41.1(1.62)	105(4.12)
	14	346(13.62)	489(19.25)	525(20.75)	44.5(1.75)	114(4.50)
	16	397(15.62)	562(22.12)	605(23.75)	50.8(2.00)	124(4.88)
	18	448(17.62)	610(24.00)	655(25.75)	53.8(2.12)	133(5.25)
	20	497(19.56)	679(26.75)	725(28.50)	63.5(2.50)	133(5.25)
	24	597(23.50)	787(31.00)	840(33.00)	73.2(2.88)	152(6.00)
Class 900	1/2	16(0.62)	60(2.38)	80(3.25)	6.4(0.25)	38(1.50)
	3/4	21(0.82)	67(2.62)	90(3.50)	6.4(0.25)	41(1.62)
	1	27(1.05)	76(3.00)	100(4.00)	6.4(0.25)	57(2.25)
	1-1/4	37(1.44)	86(3.38)	110(4.38)	9.7(0.38)	57(2.25)
	1-1/2	43(1.68)	95(3.75)	125(4.88)	9.7(0.38)	67(2.62)
	2	55(2.16)	140(5.50)	165(6.50)	12.7 (0.50)	57(2.25)
	2-1/2	67(2.64)	162(6.38)	190(7.50)	12.7(0.50)	67(2.62)
	3	83(3.26)	165(6.50)	190(7.50)	15.7(0.62)	67(2.62)
	4	108(4.26)	203(8.00)	235(9.25)	19.1(0.75)	76(3.00)
	5	135(5.30)	244(9.62)	280(11.00)	22.4(0.88)	86(3.38)
	6	162(6.36)	286(11.25)	320(12.50)	25.4(1.00)	86(3.38)
	8	212(8.33)	356(14.00)	395(15.50)	35.1(1.38	95(3.75)
	10	265(10.42)	432(17.00)	470(18.50)	41.1(1.62)	105(4.12)
	12	315(12.39)	495(19.50)	535(21.00)	47.8(1.88)	105(4.12)
	14	346(13.62)	518(20.38)	560(22.00)	53.8(2.12)	114(4.50)
	16	397(15.62)	572(22.50)	615(24.25)	60.5(2.38)	124(4.88)
	18	448(17.62)	635(25.00)	685(27.00)	66.5(2.62)	133(5.25)
	20	497(19.56)	696(27.38)	750(29.50)	73.2(2.88)	133(5.25)
	24	597(23.50)	835(32.88)	900(35.50)	88.9(3.50)	152(6.00)
Class 1500	1/2	16(0.62)	61(2.38)	80(3.25)	6.4(0.25)	38(1.50)
	3/4	21(0.82)	67(2.62)	90(3.50)	9.7(0.38)	41(1.62)
	1	27(1.05)	76(3.00)	100(4.00)	9.7(0.38)	64(2.20)
	1-1/4	35(1.38)	86(3.38)	110(4.38)	9.7(0.38)	64(2.50)
	1-1/2	41(1.61)	95(3.75)	125(4.88)	12.7(0.50)	70(2.75)
	2	53(2.07)	140(5.50)	165(6.50)	12.7(0.50)	70(2.75)
	2-1/2	63(2.47)	162(6.38)	190(7.50)	15.7(0.62)	76(3.00)
	3	78(3.07)	172(6.75)	205(8.00)	19.1(0.75)	76(3.00)
	4	102(4.03)	206(8.12)	240(9.50)	22.4(0.88)	89(3.50)
	5	128(5.05)	251(9.88)	290(11.50)	28.4(1.12)	89(3.50)
	6	154(6.06)	279(11.00)	320(12.50)	35.1(1.38)	89(3.50)
	8	203(7.98)	349(13.75)	395(15.50)	41.1(1.62)	102(4.00)
	10	255(10.02)	432(17.00)	480(19.00)	50.8(2.00)	114(4.50)
	12	303(11.94)	518(20.38)	570(22.50)	60.5(2.38)	114(4.50)
	14	333(13.12)	575(22.62)	635(25.00)	66.5(2.62)	127(5.00)
	16	381(15.00)	638(25.12)	705(27.75)	76.2(3.00)	133(5.25)
	18	429(16.88)	702(27.62)	775(30.50)	85.9(3.38)	146(5.75)
	20	478(18.81)	752(29.62)	830(32.75)	95.3(3.75)	152(6.00)
	24	575(22.62)	899(35.38)	990(39.00)	111.3(4.38)	178(7.00)
Class 2500	1/2	16(0.62)	67(2.62)	90(3.50)	9.7(0.38)	38(1.50)
	3/4	21(0.82)	73(2.88)	95(3.75)	9.7(0.38)	41(1.62)
	1	27(1.05)	83(3.25)	110(4.25)	9.7(0.38)	64(2.50)
	1-1/4	35(1.38)	102(4.00)	130(5.12)	12.7(0.50)	64(2.50)
	1-1/2	41(1.61)	114(4.50)	145(5.75)	15.7(0.62)	70(2.75)
	2	53(2.07)	143(5.62)	170(6.75)	15.7(0.62)	70(2.75)
	2-1/2	63(2.47)	165(6.50)	195(7.75)	19.1(0.75)	76(3.00)
	3	78(3.07)	194(7.62)	230(9.00)	22.4(0.88)	76 (3.00)
	4	102(4.03)	232(9.12)	275(10.75)	28.4(1.12)	89(3.50)
	5	128(5.05)	276(10.88)	325(12.75)	35.1(1.38)	89(3.50)
	6	154(6.06)	314(12.38)	370(14.50)	41.1(1.62)	89(3.50)
	8	198(7.81)	384(15.12)	440(17.25)	53.8(2.12)	102(4.00)
	10	248(9.75)	473(18.62)	540(21.25)	66.5(2.62)	114(4.50)
	12	289(11.37)	546(21.50)	620(24.38)	79.2(3.12)	114(4.50)

Functions

The spectacle blind is located in the open position to allow fluid to pass through the pipeline.

Usually, spectacle blind is located in the open position to allow fluid to pass through the pipeline.

The spectacle blind is located in the closed position to prevent the flow of fluid in the pipeline.

When the pipeline is required to be closed, insert the spectacle blind into the pipeline to make it block the pipeline and prevent the flow of fluid in the pipeline.

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