Class 125 Non-Rising Stem Gate Valve

Model：GV-06
Date Updated: September 10, 2026
Prepared by: Gate Valve Technical Department

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Class 125 Non-Rising Stem Gate Valve

▏Product Description

The Class 125 Non-Rising Stem Gate Valve (Model GV-06) from Ningjin APC Industries is a heavy-duty fluid isolation valve engineered for space-constrained municipal water distribution, wastewater management, and HVAC mechanical piping systems. Designed in compliance with MSS SP-70 specifications and pressure tested per API 598, this resilient gate valve features an internal non-rising stem (NRS) design that maintains a constant overall height during operation, making it ideal for underground vaults, pit installations, and low-clearance mechanical rooms. Constructed from high-strength Ductile Iron or Cast Iron with corrosion-resistant Bronze seating rings and a precision-machined Brass stem, the GV-06 delivers dependable bi-directional shutoff across working temperatures from -20°C to 180°C. For project contractors, mechanical engineers, and plant procurement managers requiring custom flange drilling, protective coatings, or bulk OEM industrial flow control solutions, Ningjin APC Industries provides complete manufacturing expertise and reliable global delivery.

▏Technical Features

Feature Item	Specification Details
Size	DN50-DN900 / 2"-36"
Working Pressure	Class 125
Design Standard	MSS SP-70
Test Standard	API 598
Flange Standard	ASME / ANSI B16.1 Class 125 or 16.42 Class 150 or BS EN 1092-2 PN16
Face to Face Standard	ASME B16.10 or BS EN558-1
Working Temperature	-20°C to 180°C
Note	NSF 61 and NSF 372 approval available for 2"-24"

▏Valve Material List

NO.	Description	Material
1	Body	Ductile Iron / Cast Iron
2	Seat Rings	Bronze
3	Wedge Face Rings	Bronze
4	Disc	Ductile Iron / Cast Iron
5	Wedge Nut	Brass
6	Stem	Brass
7	Body Gasket	Stainless steel spiral-wound
8	Bolts	Steel
9	Nuts	Steel
10	Bonnet	Ductile Iron / Cast Iron
11	Gland Follower Bolts	Steel
12	Suffing Box Gasket	Graphite
13	Suffing Box	Ductile Iron / Cast Iron
14	Packing	Graphite
15	Gland Follower	Ductile Iron
16	Packing Gland	Brass
17	Handwheel	Ductile Iron / Cast Iron
18	Indentification Plate	Aluminum
19	Washer	Steel
20	Handwheel Nut	Steel

▏Dimensions

DN	INCH	L	D	b	ANSI 150		Do	H
DN	INCH	L	D	b	Dk	n-d	Do	H
50	2"	178	152	15.9	121	4-19	178	289
65	2.5"	190.5	178	17.5	140	4-19	178	323
80	3"	203.2	190	19.1	152.5	4-19	200	338
100	4"	228.6	228.6	23.5	190.5	8-19	254	411
125	5"	254	254	23.8	215.9	8-22	300	503
150	6"	266.7	279.4	25.4	241.3	8-22	300	558
200	8"	292	343	28.6	298.5	8-22	348	650
250	10"	330	406	30.2	362	12-25	400	770
300	12"	356	483	31.8	432	12-25	457	861
350	14"	381	533	35	476	12-29	508	991
400	16"	406	597	36.6	540	16-29	558	1058
450	18"	432	635	39.7	578	16-32	610	1206
500	20"	457	699	42.9	635	20-32	640	1276
600	24"	508	813	47.6	749	20-35	762	1466
750	30"	610	984	54	914	28-35	813	1845
900	36"	711	1168	60.3	1086	32-42	813	2124

▏Frequently Asked Questions

What design standards and pressure ratings apply to the Class 125 Non-Rising Stem Gate Valve (Model GV-06)?

The Class 125 Non-Rising Stem Gate Valve (Model GV-06) is manufactured in compliance with MSS SP-70 design standards and tested per API 598 inspection guidelines. Engineered for reliable low-pressure fluid isolation, this valve carries a Class 125 working pressure rating across nominal pipe sizes ranging from DN50 (2") to DN900 (36"). Flange connection options comply with ASME/ANSI B16.1 Class 125, ASME 16.42 Class 150, or BS EN 1092-2 PN16, while face-to-face dimensions follow ASME B16.10 or BS EN558-1 specifications. Built to withstand operating temperatures from -20°C to 180°C, the valve provides versatile integration into municipal water distribution networks, wastewater plants, and industrial piping installations.

What materials are utilized in the construction of the Class 125 Non-Rising Stem Gate Valve?

The Class 125 Non-Rising Stem Gate Valve features a high-strength body, bonnet, disc, stuffing box, and handwheel constructed from Ductile Iron or Cast Iron. To achieve superior sealing performance and wear resistance, the seat rings and wedge face rings are precision-machined from Bronze. The internal operating stem and wedge nut are crafted from corrosion-resistant Brass, while the packing gland uses Brass to reduce operating friction. Sealing integrity between body and bonnet is secured via a stainless steel spiral-wound body gasket paired with graphite packing and a graphite stuffing box gasket. High-tensile steel bolts, nuts, and washers ensure structural rigidity under pipeline pressure.

How does the Non-Rising Stem (NRS) design benefit compact or underground valve installations?

Unlike rising stem valves where the stem lifts visually during opening, the non-rising stem (NRS) mechanism operates via internal stem threads while maintaining a constant overall height. This compact footprint is particularly advantageous for underground valve vaults, trench installations, and tight indoor mechanical rooms where overhead space is restricted. Procurement managers seeking space-saving fluid control solutions can source the Class 125 Non-Rising Stem Gate Valve wholesale supplier directly from Ningjin APC Industries for customized OEM options and full engineering compliance support.

What quality testing and certification options are available for the Class 125 Non-Rising Stem Gate Valve?

Every Class 125 Non-Rising Stem Gate Valve manufactured by Ningjin APC Industries undergoes 100% hydrostatic shell and seat pressure testing in strict accordance with API 598 standards. These factory acceptance procedures ensure zero-leakage isolation across municipal water distribution, industrial process cooling, and wastewater applications. Production lines operate under certified ISO 9001 quality management systems. Furthermore, for drinking water projects spanning nominal sizes 2" to 24" (DN50-DN600), NSF 61 and NSF 372 compliance options are available upon request to meet regional water quality standards.

What lead times and customization services are offered for bulk B2B orders of the Class 125 Non-Rising Stem Gate Valve?

Ningjin APC Industries supplies the Class 125 Non-Rising Stem Gate Valve on a made-to-order basis with a standard delivery lead time of 45 working days for international B2B projects. Global EPC contractors and valve distributors can request tailored OEM/ODM modifications, including specialized protective epoxy coatings, custom flange drilling patterns, or alternate hardware materials. Every shipment is delivered with comprehensive technical documentation, material test reports, and dimensional verification sheets to ensure total procurement confidence and hassle-free system installation.

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