300PSI Butterfly Valve with Lever - Grooved End GD-381L

Name: 300PSI Butterfly Valve with Lever - Grooved End GD-381L
Brand: Ningjin APC Industries
SKU: GD-381L
Availability: InStock

Date Updated: July 29, 2026
Prepared by: Fire Gate Valve Technical Department

Categories:

Butterfly Valve

Compliance Credentials: Strictly certified to UL 260 and FM standards for high-hazard critical infrastructure

Butterfly Valve with Lever- Grooved End

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300PSI Butterfly Valve with Lever - Grooved End GD-381L

▏Product Description

The 300PSI Butterfly Valve with Lever - Grooved End GD-381L is a heavy-duty fluid control valve engineered for fire protection and commercial piping networks. Manufactured by Ningjin APC Industries—a globally trusted UL/FM butterfly valve manufacturer and supplier—the GD-381L combines fast mechanical grooved connections with dependable bi-directional sealing performance.

Designed for operating pressures up to 300 PSI and factory test pressures up to 600 PSI, the GD-381L's pressure rating fully conforms to UL 1091, ULC / ORD-C1091, and FM 1112 standards. It features an ANSI/AWWA C606 or Metric Standard clear waterway design across sizes from 2" to 8". Constructed with a durable ductile iron body, 416 stainless steel upper and lower shafts, an EPDM encapsulated ductile iron disc, and an ergonomic malleable iron lever, this valve guarantees low operating torque and robust durability.

Equipped with an ISO 5211 top flange for standard mounting and optional NSF/ ANSI 61 & NSF/ ANSI 372 lead-free certification, the GD-381L is ideal for indoor and outdoor installations, fire inflow water systems, drain pipes, high-rising building fire fighting systems, and industrial factory buildings working in a temperature range of 0~80°C / 32~176°F.

▏Technical Features

Groove Standard	ANSI/AWWA C606 or Metric Standard Clear Waterway design
Sizes	2", 2½", 3", 4", 5", 6", 8"
Maximum Working Pressure	300 PSI
Maximum Testing Pressure	600 PSI
Pressure Compliance	Pressure conforms to UL 1091 & ULC / ORD-C1091 & FM 1112
Working Temperature Range	0~80°C / 32~176°F
Coating Details	Epoxy coated or coating upon request
Disc Design	Ductile iron disc– EPDM Encapsulated
Top Flange Standard	ISO 5211
Drinking Water Certification	Certified lead-free by NSF/ ANSI 61 & NSF/ ANSI 372 is available
Application	Indoor & Outdoor Use, Fire inflow water, drain pipe, high-rising building fire fighting system, industrial factory building fire protection system

▏Valve Material List

NO.	Name	Material
1	Upper Shaft Sealing Nut	WCB
2	Shaft Seal	EPDM
3	Body	Ductile Iron
4	Upper Shaft	416 Stainless Steel
5	Disc+Rubber Seat	Ductile Iron+EPDM
6	Lower Shaft	416 Stainless Steel
7	Lower Shaft Sealing Nut	WCB
8	Stem Bushing	PTFE / C95400
9	O-ring	EPDM
10	Lever	Malleable Iron

▏Dimensions

Size	A	B	C	D	E	F	G	H	K	P	M	N	d	L
2"	110	85	32	60.3	57.2	15.9	7.9	32	267	90	70	9	10	81 88
2½"	125	95	32	73 76.1	69.1 72.3	15.9	7.9	32	267	90	70	9	10	96.4
3"	140	100	32	88.9	84.9	15.9	7.9	32	267	90	70	9	11	97
4"	160	100	32	114.3	110.1	15.9	9.5	32	267	90	70	9	14	115.1
5"	170	125	32	139.7 141.3	135.5 137	15.9	9.5	32	267	90	70	9	14	132.4 148
6"	190	140	32	165.1 168.3	160.9 164	15.9	9.5	32	267	90	70	9	16	132.4 148
8"	230	175	37	216.3 219.1	211.6 214.4	19	11.1	37	353	125	102	12	19	147.4 133

▏Frequently Asked Questions

Q1: What engineering standards and pressure ratings govern the GD-381L grooved butterfly valve?

A: The GD-381L lever grooved butterfly valve has a maximum working pressure of 300 PSI and a shell testing pressure of 600 PSI. Its pressure design conforms to UL 1091, ULC / ORD-C1091, and FM 1112 standards. It conforms to ANSI/AWWA C606 or Metric Standard clear waterway design with an ISO 5211 top flange. For additional engineering specifications, engineers can check the official 300PSI grooved butterfly valve specification.

Q2: What materials are used in the BOM list of the GD-381L butterfly valve?

A: The GD-381L is built with a ductile iron body, an EPDM encapsulated ductile iron disc, and upper/lower shafts made of 416 stainless steel. It features WCB upper and lower shaft sealing nuts, EPDM shaft seals and O-rings, a PTFE / C95400 stem bushing, and a lever made of malleable iron to ensure effortless torque and reliable operation.

Q3: What working temperature range can the GD-381L grooved butterfly valve handle?

A: The GD-381L operates within a working temperature range of 0~80°C / 32~176°F. It is coated with protective epoxy (or custom coating upon request) for superior corrosion protection in both indoor and outdoor fire fighting environments.

Q4: Is the GD-381L butterfly valve available with drinking water certifications?

A: Yes, certified lead-free compliance according to NSF/ ANSI 61 & NSF/ ANSI 372 is available upon request, making the valve suitable for dual-purpose plumbing or potable water lines in addition to fire inflow and drain pipes.

Q5: What size ranges are offered for the GD-381L lever grooved butterfly valve?

A: The GD-381L series is available in nominal sizes of 2", 2½", 3", 4", 5", 6", and 8", fully supported with standardized dimensional specs for fast field assembly.