Non-Rising Stem Gate Valve Manufacturer

Non-Rising Stem Gate Valve

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Non-Rising Stem Gate Valve

Non-rising stem gate valve is a special type of gate valve where the valve stem is located inside the valve body and is not exposed externally. This design minimizes the risk of contaminating the transported media in pipelines.

Applications

Non-rising stem gate valves can be used in various applications, including water conveyance systems, seawater pipeline systems, gas pipeline systems, food-grade media conveyance systems and weak acid-base transport systems.

Basic Information

Size Range: DN50-DN600

Temperature Range T: 0-100℃

Maximum Allowable Operating Pressure PN: 1.0-1.6Mpa

Pressure Rating: 1.5-2.4Mpa (Shell)
1.1-1.76Mpa (Seal)

Applicable Media: Freshwater, seawater, air, weak acid-base, and so on.

Materials

No.	Part	Materials	No.	Part	Material
1	Valve Body and Valve Bonnet	QT450	6	O-Ring	EPDM
2	Valve Disc	QT450 EPDM	7	Packing	PTFE
3	Valve Stem	2Cr13	8	Bolts	Stainless Steel, 45#
4	Valve Stem Nut	Aluminum Bronze	9	Nuts	Stainless Steel, 45#
5	Gland	QT450	10	Valve Handwheel	WCB

Specifications

Size	L	H	D	d	c	g	n-Ød		T	f
Size	L	H	D	PN10/16	PN10/16	g	PN10	PN16	T	f
DN50	178	241	138	158	125	99	4-Ø18	4-Ø18	17	2
DN65	190	270	173	180	145	118	4-Ø18	4-Ø18	17	2
DN80	203	292	173	196	160	132	4-Ø18	8-Ø18	19	3
DN100	229	333	200	215	180	156	8-Ø18	8-Ø18	20	3
DN125	254	384	230	250	210	184	8-Ø18	8-Ø18	20	3
DN150	267	420	230	280	240	211	8-Ø23	8-Ø23	20	3
DN200	292	512	270	336	295	266	8-Ø23	12-Ø23	21	3
DN250	330	602	350	405	350/355	319	12-Ø23	12-Ø25	25	3
DN300	356	705	350	460	400/410	370	12-Ø23	12-Ø25	28	4
DN350	381	782	450	515	460/470	430	16-Ø23	16-Ø25	28	4
DN400	406	880	480	580	515/525	475	16-Ø25	16-Ø30	28	4
DN450	432	980	600	650	565/585	530	20-Ø25	20-Ø30	29	4
DN500	457	1055	600	670/715	620/650	580	20-Ø25	20-Ø34	29	4
DN600	508	1260	600	780/810	725/770	680	20-Ø30	20-Ø40	38	4

Certifications

Item	Standard
Design & Manufacture	GB12234
Face to Face Dimension	GB12221-89
Flange Connection	JB/T-79
Valve Test	JB/T-9092

Features

Flat Bottom Valve Seat: The soft-sealing gate valve uses a flat bottom design similar to water pipes, which prevents debris accumulation and ensures smooth fluid flow.
Integral Rubber Coating: The valve disc is coated internally and externally with high-quality rubber. Advanced rubber vulcanization technology ensures precise geometric dimensions after vulcanization. The rubber is securely bonded to the ductile iron gate plate, preventing detachment, maintaining excellent elasticity, and providing superior sealing.
Corrosion Resistance: The valve body is coated with epoxy resin powder, providing corrosion and rust resistance, making it suitable for sewage pipelines.
Triple O-Ring Seal: The valve stem features a triple O-ring seal design, reducing friction resistance during operation and significantly decreasing the likelihood of leakage. This design allows for seal replacement without the need to shut off the water flow.
The valve is made of ductile iron, making it lighter than traditional gate valves, which facilitates installation and maintenance while providing increased impact resistance.
Non-rising stem gate valves have their operating stems located inside the valve body, not exposed to external environments, which makes them suitable for applications where sensitivity to stem contamination is a concern, such as the fluid control in hygienic pipelines.