Scotch Yoke Fixed Trunnion-Mounted Top Entry Ball Valve with DBB Structure

Valve Type: Scotch Yoke Top Entry Trunnion Mounted Ball Valve
Pressure Rating: ASME Class 600 (Additional pressure classes available upon request: Class 150, 300, 900, 1500, 2500)
Size Range: 2"–64" (DN50–DN1600); larger sizes available upon request
Ball Design: Trunnion Mounted
Body Construction: Forged body with bolted top cover for easy maintenance (Top Entry)
Sealing Design: Double Block and Bleed (DBB)
Seat Material Options: Metal Seat (standard), Soft Seat (for specific applications)
Operating Temperature: -40℃ to 550℃ (dependent on material selection)
End Connection: Flanged RF / RTJ
Operation: Scotch Yoke Pneumatic Actuator
Mounting Interface: ISO 5211 direct mounting available
Materials: WCB, LCB, LCC, WC6, WC9, Stainless Steel, Duplex, Super Duplex, Nickel Alloys
Design Standards: Designed based on API 6D, BS 5351, ASME B16.34 guidelines
Fire-Safe Design: Built in accordance with API 607 / API 6FA fire-safe principles
Sealing Direction: Bi-directional sealing
Brand: SLVCN

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Product Description

Class 600 Scotch YokeTOP Entry Ball Valve

Product Description

SLVCN Class 1500 Top Entry Trunnion Mounted Ball Valve is designed for reliable isolation in high-pressure, demanding environments, such as oil & gas, chemical processing, and power generation.

This valve features a trunnion-mounted ball and a Double Block and Bleed (DBB) sealing system for secure isolation and cavity pressure control, even under high differential pressures. The top-entry design allows for easy in-line inspection and maintenance, reducing downtime significantly in continuous operations.

Constructed with a durable one-piece cast WCB body, this valve provides high structural integrity while keeping costs manageable for large and high-pressure applications. Key safety features include fire-safe design, anti-static protection, and anti-blowout stem, ensuring safe operation in hazardous conditions. Materials and sealing systems are also available to meet NACE MR0175 standards for sour gas service.

Key Features

✓ Real-Time Bleed Cavity Monitoring

DBB visual monitoring via pressure gauge or discharge port, allowing early leak detection for safe operation.

✓ Scotch Yoke Actuator with Precision Control

Dead-zone-free design ensures precise valve synchronization, enabling smooth automated system control.

✓ Low-Torque Fixed Ball Design

Even load distribution reduces operating torque by 40%, extending actuator life and improving valve efficiency.

✓ Wide Temperature Range

Handles temperatures from -40℃ to 550℃, suitable for complex and extreme media.

✓ Fire-Safe Design for Hydrocarbon Service

Fire-safe construction maintains sealing integrity during fire exposure, meeting emergency isolation needs for oil & gas and chemical industries.

Technical Specifications

Technical Specifications Dimensions: Class 300 - Full Port

Size	Bore		Model / Face to Face			D2 in/mm	Weight
NPS/DN	B1in/mm	B2 in/mm	FT RFin/mm	FT RTJ in/mm	FT BWE in/mm	D2 in/mm	Model FT lb/kg
2"	1.94	1.94	11.5	11.63	11.5	7.5	121
50	49	49	292	295	292	190	55
3"	2.94	2.94	14	14.13	14	9.4	276
80	74	74	356	359	356	240	125
4"	3.94	3.94	17	17.13	17	11.4	507
100	100	100	432	435	432	290	230
6"	5.94	5.94	22	22.13	22	14.6	606
150	150	150	559	562	559	370	275
8"	7.94	7.94	26	26.13	26	16.3	1124
200	201	201	660	664	660	415	510
10"	9.94	9.94	31	31.13	31	19.9	1279
250	252	252	787	791	787	505	580
12"	11.94	11.94	33	33.13	33	22.6	1609
300	303	303	838	841	838	575	730
14"	13.19	13.19	35	35.13	35	26.4	2072
350	334	334	889	892	889	670	940
16"	15.19	15.19	39	39.13	39	28	3087
400	385	385	991	994	991	712	1400
18"	17.19	17.19	43	43.13	43	29.8	4079
450	436	436	1092	1095	1092	757	1850
20"	19.19	19.19	47	47.25	47	36.4	5181
500	487	487	1194	1200	1194	925	2350
22"	21.19	21.19	51	51.38	51	37.3	7341
550	538	538	1295	1305	1295	947	3330
24"	23.19	23.19	55	55.38	55	42.5	8598
600	589	589	1397	1407	1397	1080	3900

Weight and dimensions for larger valve sizes up to 64" available on request. For more dimensions, please contact us.

Dimensions: Class 300 - Reduced Port

Size	Bore		Model / Face to Face			D2 in/mm	Weight
NPS/DN	B1 in/mm	B2 in/mm	GT RF in/mm	GT RTJ in/mm	GT BWE in/mm	D2 in/mm	Model GT lb/kg
2"×11/2"	1.94	1.5	11.5	11.63	11.5	6.5	66
50×40	49	38	292	295	292	166	30
3"×2"	2.94	1.94	14	14.13	14	8.3	143
80×50	74	49	356	359	356	210	65
4" X3"	3.94	2.94	17	17.13	17	10	298
100×80	100	74	432	435	432	255	135
6" ×4"	5.94	3.94	22	22.13	22	12.6	551
150×100	150	100	559	562	559	320	250
8"×6"	7.94	5.94	26	26.13	26	15	661
200×150	201	150	660	664	660	381	300
10"X8"	9.94	7.94	31	31.13	31	17.5	1191
250×200	252	201	787	791	787	445	540
12"×10"	11.94	9.94	33	33.13	33	20.5	1367
300×250	303	252	838	841	838	520	620
14"×10"	13.19	11.94	35	35.13	35	23	1764
350×250	334	252	889	892	889	585	800
14"×12"	13.19	11.94	35	35.13	35	23	1984
350×300	334	303	889	892	889	585	900
16"×12"	15.19	11.94	39	39.13	39	25.6	2161
400×300	385	303	991	994	991	650	980
20"X16"	19.19	15.19	47	47.25	47	30.5	4057
500×400	487	385	1194	1200	1194	775	1840
24"×20"	23.19	19.19	55	55.38	55	36.4	6371
600×500	589	487	1397	1407	1397	925	2890
28"×24"	26.94	23.19	61	61.5	61	AOR	9877
700×600	684	589	1549	1562	1549	1080	4480