Bellows Seal · DIN Standard · Zero Emission

DIN Bellows Seal Globe Valves for Leak-Free High-Temperature Service

PN16~PN40, sizes 1/2″ to 16″ (DN15~400mm), available in GS-C25, GGG-40, 1.4401, 1.4408 per DIN 3356 — rated for over 10,000 cycles without failure.

Overview

DIN bellows globe valve solves one of the most frequent and serious problems that valve faces with is stem gland packing leakage, which results in wasted and increased downtime for the factory. Apart from the high cost of energy losses, gland leakages can also cause serious environmental, ecological and health hazards to factory workers. The leakage of sensitive materials can also constitute to the fire hazard, explosion, or damage to equipment by corrosive materials. If the leaked air enters into the pipeline, it could produce inflammable explosive or poisonous mixtures. Gland packed valve often requires continual maintenance in accessibility creating particular difficulties. The bellows valves are widely applicable to working conditions of high temperatures, withstanding over 10,000 cycles without failure. Flowspec Luokai can manufacture the DIN bellows globe valve according to DIN 3356 with pressure of PN16~PN40. Contact us today. Get the better prices. 30 years of experience. Great after-sales service.

1. Features

Bellows seal element: the key part is the bellow, which is roll welded with stem assembly on the bottom, and is roll welded with connecting cover on the top, forming a metal barrier between the mediums and atmosphere, and ensuring there is no leakage from the stem packing.
Tapered design valve disc: valve sealing seat and mediums are designed to streamline, the disc can remove the impurity with better sealing and long service life.
Double seal design (bellows + packing): if bellows seal is failed, the stem packing can take sealing effects, preventing of stem leakage.
Patented central location design: prevent the stem from being with tremble or noise, making the bellows has stable performance and long service life.
Valve bonnet is with grease nipple, which can lubricate the valve stem, nuts and stem sleeve directly.
Ergonomic design hand wheel, long service life, easier operation, safe and reliability.
Compound valve casting technology: sand is mixed with binder and other additives, which make the rough casting is with fewer defects, such like pore, trachoma or cracks, but better tensile strength.

2. Technical Specifications

PN1.6MPa / PN2.5MPa / PN4.0MPa
Size: 1/2″ ~ 16″ (DN15~400mm)
Materials: steel GS-C25, GGG-40, 1.7363, 1.4401, 1.4408, 1.4306, 1.4301
Applicable medium: water, hot oil, gas, steam
Applicable temperature: -29℃ ~ +350℃

3. Standards

Design & manufacturing: DIN 3356
Face to face: DIN 3202
Flanged ends: DIN 2543-2545
Inspection & testing: DIN 3230

4. Applications

Petroleum
Chemical Industry
Pharmacy
Chemical Fertilizer
Power Plant
Textile
Printing & Dyeing

Standard Materials of Main Parts

Part	Material	Standard
Body	GG25 / GGG50	DIN 1693 / BS EN1561
Seat ring	CuZn39Pb2 / C37000	EN12167 / ASTM B135
Disc	GGG50	DIN 1693 / BS EN1561
Bonnet Gasket	NBR / EPDM	ISO4633
Packing	Graphite	–
Bonnet	GG25 / GGG50	DIN 1693 / BS EN1561
Stem	X20Cr13 / 420	EN10088-1 / ASTM A959
Stem Nut	CuZn39Pb2	EN12167
Screws	C45 / 1045	EN10083 / ASTM A29
Bolt	C45 / 1045	EN10083 / ASTM A29
Gland	GG25 / GGG50	DIN 1693 / BS EN1561
Handwheel	GG25 / GGG50	DIN 1693 / BS EN1561

Dimensions

DN	Outline (mm)		EN1092-2 PN10/16			ASME B16.1/B16.42 CL125/150			AS4087
DN	L	H	D	K	n-d	D	K	n-d	D	K	n-d
50	230	270	165	125	4-Ф19	152	120.5	4-Ф19	–	–	–
65	290	280	185	145	4-Ф19	178	139.5	4-Ф19	–	–	–
80	310	330	200	160	8-Ф19	191	152.5	4-Ф19	185	146	4-Ф18
100	350	365	220	180	8-Ф19	229	190.5	8-Ф19	215	178	4-Ф18
125	400	405	250	210	8-Ф19	254	216	8-Ф22	–	–	–
150	480	435	285	240	8-Ф23	279	241.5	8-Ф22	280	235	8-Ф18
200	600	520	340	295	8-Ф23 / 12-Ф23	343	298.5	8-Ф22	335	292	8-Ф18
250	730	650	395 / 405	350 / 355	12-Ф23 / 12-Ф28	406	362	12-Ф25	405	356	8-Ф22
300	850	680	445 / 460	400 / 410	12-Ф23 / 12-Ф28	483	432	12-Ф25	455	406	12-Ф22