Demco NE-C Series Butterfly Valve & DM7500 Gate Valve Spare Parts

Product Introduction

This curated selection of flow control spare parts covers all high-wear and critical components for Demco butterfly/gate valves and hammer union connections, including valve seats, locking handles, major/minor repair kits, union seals, O-rings, gate assemblies, stem seals, and pressure-rated hardware. Every part is manufactured to meet API 6A, API 16C, and NACE MR0175 standards, with 100% pressure testing to withstand harsh drilling mud, abrasive fluids, and high-pressure cycling. Parts are traceable to unique OEM part numbers, simplifying inventory stocking and rapid field troubleshooting.

Functional Performance Specifications

These spare parts are engineered to preserve full flow control performance: Demco NE-C butterfly valve seats deliver bubble-tight shutoff for 2″-12″ iron body valves; DM7500 gate valve repair kits maintain 7500 PSI working pressure with zero leakage; hammer union O-rings/seals seal reliably up to 15,000 PSI for FIG 1502/1002/602 connections; and locking handle assemblies ensure precise 10-position flow regulation. Nitrile and Viton sealing materials resist abrasion, chemical degradation, and H₂S exposure, with a 40% longer service life than standard aftermarket seals.

Structural & Material Features

• OEM-Certified Fitment: Precision-machined to match Demco valve and hammer union dimensions, requiring no on-site modification for installation
• High-Performance Materials: Buna-N/Viton rubber for seals, forged alloy steel for valve gates/stems, and corrosion-resistant hardware for harsh oilfield environments
• Pressure & Abrasion Resistance: Rated for 2000-7500 PSI working pressure, with hardened surfaces to resist drilling mud abrasion
• Modular Repair Design: Pre-packaged major/minor valve repair kits reduce field repair time by up to 60% compared to loose component replacements
• Compliance with Industry Standards: Meets API 6A, API 16C, and NACE standards for oilfield flow control equipment safety and reliability

Applicable Operating Conditions

These flow control spares are built for harsh onshore/offshore oilfield environments, including drilling mud systems, production manifolds, choke and kill lines, and pipeline fluid transfer. They perform reliably in ambient temperatures ranging from -20°F to 150°F, high-abrasion mud conditions, H₂S-containing fluids, and continuous high-pressure cycling. Components are rated for both low-pressure (200 PSI) and high-pressure (7500+ PSI) fluid handling applications.

Maintenance & Service Recommendations

• Inspect butterfly valve seats and gate valve seals every 3 months for wear, cracking, or abrasion to prevent fluid leakage
• Lubricate valve stems and handle mechanisms quarterly to ensure smooth operation and prevent seizing
• Replace hammer union O-rings/seals during every disconnection to maintain pressure integrity and avoid blowouts
• Conduct pressure testing of repaired valves post-installation to verify compliance with API working pressure ratings
• Stock critical wear parts (seats, seals, O-rings) preventatively to minimize unplanned flow control downtime
• We supply the following spare parts:

S/N	Item Description	Maker	Part Number	Uom
1	BUTTERFLY VALVE: NE-C SERIES 2IN IRON	DEMCO	221191215311	EA
2	BUTTERFLY VALVE: NE-C SERIES 3IN IRON	DEMCO	221211215311	EA
3	BUTTERFLY VALVE: NE-C SERIES 4IN IRON	DEMCO	221221215311	EA
4	BUTTERFLY VALVE: NE-C SERIES 6IN IRON	DEMCO	22124-1215311	EA
5	BUTTERFLY VALVE: NE-C SERIES 8IN IRON	DEMCO	22125-1215311	EA
6	BUTTERFLY VALVE: NE-C SERIES 10IN IRON	DEMCO	0221261215311	EA
7	BUTTERFLY VALVE: NE-C SERIES 12IN IRON	DEMCO	221271215311	EA
8	BUTTERFLY VALVE: 2 ” RESILIENT SEATED	DEMCO	22279	EA
9	BUTTERFLY VALVE: 3IN NE-C SERIES 200PSI	DEMCO	22121-5115311	EA
10	BUTTERFLY VALVE: 4 ” RESILIENT SEATED	DEMCO	22281	EA
11	BUTTERFLY VALVE: 6 ” RESILIENT SEATED	DEMCO	22283	EA
12	BUTTERFLY VALVE: 10 ” RESILIENT SEATED	DEMCO	22284	EA
13	BUTTERFLY VALVE: 12 ” RESILIENT SEATED	DEMCO	22260	EA
14	HANDLE: 10IN ASSEMBLY -CORR 10 POSS	CAMERON	24230-002	EA
15	HANDLE: 10 POSITION STANDARD CR 8″	DEMCO	24229002	EA
16	HANDLE: LOCKING 2-4IN 10POS B/FLY VALVE	DEMCO	24227-001	EA
17	VALVE HANDLE: LOCKING 5IN-6IN10 POSITION	DEMCO	24228001	EA
18	VALVE HANDLE: LOCKING 8IN 10POS B/FLY V	DEMCO	24229-001	EA
19	HANDLE: 10IN BUTTERFLY VALVE 10 POS	CAMERON	J024230-001	EA
20	HANDLE: 12IN BUTTERFLY VALVE 10 POS	CAMERON	J024231-001	EA
21	REPAIR KIT: MAJOR 2IN DM 7500 GATE VALVE	DEMCO	J025177-11574	KIT
22	REPAIR KIT: MINOR REPAIR	DEMCO	J02509101421	KIT
23	REPAIR KIT: MINOR 1-1/2IN DM 7500 VALVE	DEMCO	J025177-01574	KIT
24	REPAIR KIT: MAJOR 2IN DM7500(FP) GATE VA	DEMCO	J025177-10274	KIT
25	REPAIR KIT: MAJOR 3IN DM7500 GATE VALVE	DEMCO	J025177-10374	KIT
26	REPAIR KIT: MINOR 4IN GATE VALVE 7.5K	DEMCO	J025177-00474	KIT
27	REPAIR KIT: MAJOR 4IN DM7500 GATE VALVE	DEMCO	J025177-10474	KIT
28	REPAIR KIT: MINOR 2IN DM7500(FP) GATE VA	DEMCO	J025177-00274	KIT
29	REPAIR KIT: 2″ MINOR FOR VALVE 2-5K PSI	DEMCO	J02521601221	KIT
30	REPAIR KIT: MINOR 4IN DEMCO GATE VALVE	DEMCO	J025216-04221	KIT
31	REPAIR KIT: 3″ MINOR 7.5K VALVE	DEMCO	J02517700374	KIT
32	REPAIR KIT: MAJOR 2IN 5K MUD GATE VALVE	DEMCO	J025216-11221	KIT
33	REPAIR KIT: MAJOR 4IN DM GATE VALVE 5K	DEMCO	J025216-14221	KIT
34	HAMMER SEAL UNION  (TANK UNION)  3IN  K	KEMPER	PS300A	EA
35	UNION;HAMMER;4″;4-1/2″OD;CONN PIPE	KEMPER	PS400A	EA
36	TELESCOPIC STEEL UNION 6” (THREE-PIECE	KEMPER	PS600A	EA
37	HAMMER UNION: 8IN HAMMERSEAL	KEMPER	PS800A	EA
38	HAMMER UNION: 10IN HAMMERSEAL>	KEMPER	PS100A	EA
39	UNION;HAMMER;12″;12-3/4″OD;CONN PIPE	KEMPER	PS120A	EA
40	UNION;HAMMERSEAL;SIZE NOM CONN PIPE14″OD	KEMPER	PS140A	EA
41	16″ HAMMER SEAL UNION  KEMPER  USA  P/N	KEMPER	PS160A	EA
42	O-RING: 7/8IN DX4.5X6.25OD	B. HANSEN INC	PS40OR	EA
43	O-RING: 7/8X6.625X8.375IN 6IN HAMMERSEAL	KEMPER	PS60OR	EA
44	O-RING: 7/8X8.625X10.375INOD HAMMERSE	KEMPER	PS80OR	EA
45	O-RING: SEAL 7/8X10.75IN IDX12.5IN OD	KEMPER	PS10OR	EA
46	O-RING: 7/8IN X 12.75 X 14.50OD PS12OR	KEMPER	PS12OR	EA
47	O-RING: 7/8IN X 14X15.75OD	KEMPER	PS14OR	EA
48	O-RING / SEAL  F/16IN HAMMER SEAL UNION	KEMPER	PS16OR	EA
49	SEAL RING: NITRILE FMC 2IN FIG. 1502 W	FMC	3201465	EA
50	SEAL: 3IN 1502 WECO HAMMER UNION	FMC	3205604	EA
51	O-RING: FOR FIG 1002 HAMMER UNIONS	WECO	0712100	EA
52	SEAL, RING UNION 4 INCH FIG 1002/602	KEMPER	620495	EA
53	SEAL, RING FOR 5″ FIG 1002 WING UNION	KEMPER	120594	EA
54	SEAL RING: 4IN  SWVL JOINT HAMMER UNION	NOV-ANSON	152406SSL	EA
55	SEAL: HAMMER UNION 1IN FIG.602 WECO	FMC	3215293	EA
56	VALVE SEAT: DEMCO 4IN STEEL BUNA SEAL	DEMCO	J002207-021	EA
57	VALVE SEAT: 2IN 7500PSI MUD VALVE	DEMCO	2269403-01	EA
58	VALVE SEAT: 2IN 7500PSI MUD VALVE	DEMCO	2269403-01	EA
59	UNION;HAMMER;1-1/2IN;FIG602;6KPSI WP	KEMPER	621500	EA
60	HAMMER UNION: WING 2IN2K PSI THREAD ENDS	FMC	3200778	EA
61	HAMMER UNION: 2IN 1502 FEMALEXFEMALE 10K	NOV-ANSON	ASG21542154	EA
62	UNION, 3 INCH HAMMER FIG 1502 BW XXH	KEMPER	150340	EA
63	UNION  PIPE BUTT WELD 4IN API 16C HAMME	N/A	3216071	EA
64	SUB;4″;WECO;WING UNION;THREADED END	WECO	3205449	EA
65	UNION;HAMMER;FIG 1002;4″;BUTTWELD XXH	WECO	3223451	EA
66	VALVE SEAT: 4IN 7.5KGV 410 ST/ST INSERT	CAMERON	2139746-01	EA
67	GATE VALVE GATE: 4IN  7500 DM VALVE	CAMERON	2171267-01	EA
68	HANDLE: LOCK GATE VALVE	DEMCO	J001891	EA
69	SEAL: HAMMER O-RING SIZE.3″	KEMPER	PS30OR	EA
70	O-RING;4″;FIG 206 WING UNIONS	NOV-ANSON	3257810	EA
71	HAMMER UNION: WING, THREADED END 3IN 200	WECO	3219546	EA
72	PACKING: FOR FIG-1502 HAMMER UNIONS	WECO	0711025	EA
73	HAMMER UNION: 5IN FIG1002 7500PSI WP	ANSON LIMITED	BW102501XXS	EA
74	LIP SEAL: VITON 4IN FIG 1002 WECO	WECO	3232654	EA
75	SEAL RING: 5IN FIG1002 H2S SVCE	FMC	3232387	EA
76	SEAL RING: UNION 1-1/4IN&1-1/2IN FIG 602	WECO	621595	EA
77	BONNET SEAL: DEMCO GATE VALVE 4IN 7500PS	DEMCO	2712426-11	EA
78	SEAL: 12IN AIRO-UNION FOR MUDLI	KEMPER	P1280T	EA
79	FLANGE;WELD NECK;6″ ANSI 300 RF;SCH40	N/A		EA
80	UNION;HAMMER;1IN;FIG602;6KPSI WP	KEMPER	620100	EA
81	UNION HAMMER: BUTTWELD FIG 200 6IN 2000P	KEMPER	020610	EA
82	HANDLE: 10 POSITION SANITARY 6″	DEMCO	22320002	EA
83	HAMMER UNION: 4″ FIG200 2000PSI CWP	KEMPER	020410	EA
84	HAMMER UNION: 6″ FIG 206 2000PSI CWP	KEMPER	260610	EA
85	UNION, HAMMER2″FIG200 THREADED 2000 PSI	KEMPER	20200	EA
86	DUST CAP: POLYETHYLENE 1/2IN YELLOW	CARPLUGS	WW-9	EA
87	PLUG: CAP YELLOW PLASTIC 1IN END CONNECT	N/A	WW-14	EA
88	DUST CAP: POLYETHYLENE 1-1/4IN YELLOW	CARPLUGS	WF-28	EA
89	DUST CAP: POLYETHYLENE 1-1/2IN YELLOW	CARPLUGS	WF-35	EA
90	UNION;5″;FIG1002	KEMPER	120540	EA
91	STEM SEAL: ASSEMBLY 2-1/2IN-3IN 2000PSI	BAKER HUGHES	51818203	EA
92	DIAPHRAGM 10IN AIR-O-SEAL	VICTAULIC	3207155	EA
93	SEAT: FOR 2IN 5000 DM GATE VALVE	CAMERON	1876011	EA
94	HAMMER UNION: 2IN FIG 1502 15KPSI	KEMPER	150240	EA
95	GATE VALVE GATE: 4/5IN DM SERIES 5KPSI	DEMCO	J001926-002	EA
96	KEY:  4IN 5000PSI WP DEMCO GATE VALVE	CAMERON	J005305-10016	EA
97	GATE: STAINLESS STEEL/QPQ 410 SS	FORUM ENERGY TECHNOLOGIES	213963702	EA
98	STEM: SEAL ASSY 7500 DM 4IN GATE VALVE	DEMCO	J015853-008	EA
99	GATE VALVE: 2″ FULL PORT DM ASS.7500PSI	DEMCO	J0251423772140	EA
100	GATE VALVE: PN 7500PSI 2″	DEMCO	J0251962572140	EA
101	GATE: FOR 2IN VALVE 5KWP FULL PORT XXH	DEMCO	J0010312522110	EA
102	MUD VALVE: 5X4IN 5KPSI 4IN FIG1002 MXFE	DEMCO	J007421-2522110	EA
103	GATE VALVE: 5INX4IN 5000PSI 4IN BW XXS	DEMCO	J025118-2582110	EA
104	VALVE STEM: GATE 4INDEMCO	DEMCO	2140684-01	EA
105	SCREW: STEM DEMCO 2IN DM GATE V/V 5KPSI	DEMCO	J001913	EA
106	O-RING: DEMCO 2-1/16IN 5KPSI GATE VALVE	DEMCO	J005526342	EA
107	SCREW: STEM 4IN DEMCO DM GATE V/V 5KPSI	DEMCO	J007416	EA
108	HUB: ASSY HANDWHEEL DEMCO V/V 25003	DEMCO	213971201	EA
109	VALVE SEAT: 2IN 7500 DMGV 410 ST/ST	CAMERON	2139742-01	EA
110	GATE VALVE GATE: 2IN 7500PSI	CAMERON	2171111-01	EA
111	RETAINER: PKG 2.243 X 0.770	CAMERON	J001940	EA
112	STEM SEAL: ASS BUNA-N 4IN DM GATE V/V	DEMCO	J001951001	EA
113	STUD: BONNET 3INDEMCO DM GATE V/V 5KPSI	DEMCO	J002066	EA
114	O-RING: 2IN 7500PSI MUD VALVE	DEMCO	J005521-225	EA
115	O-RING: DEMCO GATE VALVE	DEMCO	J005521-342	EA
116	O-RING: GATE VALVE 4IN DEMCO	DEMCO	J005521-349	EA
117	O-RING: GATE VALVE 4IN DEMCO	DEMCO	J005521-364	EA
118	SEAL: SECONDARY DEMCO	DEMCO	J005526214	EA
119	O-RING: BUNA 70 DURO	CAMERON	J005526-224	EA
120	O-RING;VALVE;BUNA 70 DURO	CAMERON	J005526228	EA
121	BONNET SEAL: VITON 2IN DM SERIES VALVE	CAMERON	J005531-342	EA
122	BONNET SEAL: VITON 4IN DM SERIES VALVE	CAMERON	J005531-439	EA
123	SCREW: RETAINER , ALLOY STEEL ITEM 3	DEMCO	J00566532028	EA
124	CAP:STEM DM GATE VALVE ASSY	DEMCO	J007411	EA
125	RETAINER: DEMCO 4IN DM GATE V/V 5000PSI	DEMCO	J007413	EA
126	RING: DOWNSTOP 4IN DEMCO DM GATE V/V	DEMCO	J007417	EA
127	BEARING: 4IN DEMCO DM GATE VALVE 5000PSI	DEMCO	J007426	EA
128	TUBE: CLEAR ACRYLIC 4IN DM GATE VALVE	DEMCO	J007459	EA
129	SIGHT GLASS: MUD VALVE 5INX4IN 7500PSI	DEMCO	J012852	EA
130	PACKING: RETAINR AISI C-1018 ITEM 21	DEMCO	J015330	EA
131	CAP: STEM CUP ITEM 24	DEMCO	J015855	EA
132	STEM SEAL: ASSY 2IN 2500GV	DEMCO	J023231-006	EA
133	STEM SEAL: ASSEMBLY HNBR	DEMCO	J023231008	EA
134	GATE VALVE: 2IN 5000PSI WELD END BUNA CS	DEMCO	J024929-2582110	EA
135	VALVE STEM: CHOKE MANIFOLD	DEMCO	J024951107	EA
136	STEM: J024983-107 COOP-CAM	CAMERON	J024983-107	EA
137	BUTTERFLY VALVE: NE-C SERIES 5IN IRON	DEMCO	221231215311	EA
138	HAMMER UNION: 6IN FIG 200NPT 2KPSI SCRWD	NOV-ANSON	200601	EA
139	LEVER: HAND FOR 6″ BUTTERFLY VALVES	DEMCO	HLAFO714340	EA
140	GATE VALVE: S-5000. 5″X4″ 5000PSI DEMCO	DEMCO	J0172642522110	EA
141	HAMMER UNION: 5IN 7500CWP FIG 1002	AMERICAN BLOCK	1002B50XXH	EA
142	SEAL: FOR 1-1/2IN FIG 602	WECO	#N/A	EA
143	VALVE SEAT: B/FLY 8IN BUNA-N SERIES NE-C	DEMCO	1798031	EA
144	VALVE SEAT: B/FLY 2IN BUNA-N SERIES NE-C	DEMCO	1786031	EA
145	SEAL: FOR FIG 1003 HAMMER UNIONS 5IN	WECO	712130	EA
146	HAMMER UNION: PLUG 2IN FIG-1502 FEMALE	WECO		EA
147	PIPE UNION: PLUG 2IN MALE	UNION NUT	3245163	EA
148	FLANGE: 4IN SLIP ON 200PSI	#N/A	689100	EA
149	HAMMER UNION: LOW PRESSURE 1 1/2″	KEMPER	021500	EA
150	PRESSURE GAUGE: BOURDON TUBE 0-10BAR	WIKA	7203556	EA
151	BUTTERFLY VALVE: 4IN VIC 300-SERIES	VORTEX	VT-BF-4-300-M1	EA
152	COUPLER: HYDRAULIC INLET 1/8″ NPT	LINCOLN ELECTRIC	5852	EA
153	SEAL,BONNET,271242560	CAMERON	271242560	EA
154	GATE VALVE: PN 7500PSI 2″	FORUM ENERGY TECHNOLOGIES	213962402	EA
155	PRESSURE GAUGE: DIAL 0-6BAR	RS COMPONENTS LIMITED	405-5600	EA
156	CLIP: 4IN  7500 DMGV/302 GATE V/V	CAMERON	M450505	EA
157	CROSSOVER: INTEGRAL 2″ FIG 1502 M X M	KEMPER	1502MX2M	EA
158	GATE VALVE: 2″ FULL PORT DM ASS.7500PSI	DEMCO	J0251303772140	EA
159	UNION  PIPE 6IN THREADED 1000PSI HAMMER	N/A	P07-U003	EA
160	ASSEMBLY;UNION;2″ NPT	SCHLUMBERGER	3207281	EA
161	HAMMER UNION  1-1/2IN  FIG 200	N/A	133895	EA
162	PIPE UNION: 10IN	WECO	3202566	EA
163	RING: FOR BASE BODY FOR VALVE 2″-7500 PS	DEMCO	213964702	EA
164	BONNET SEAL: 4IN VALVE	DEMCO	5520439	EA
165	REPAIR KIT: VALVE 2″ & 5″	DEMCO	DGVRK250101	EA
166	FLANGE;WELD NECK;4″ ANSI 600 RF;SCH80	N/A		EA
167	BUTTERFLY VALVE: 2″, LUG TYPE, NE-1	DEMCO	221285424311	EA
168	GATE VALVE: 4IN DEMCO	WILSON UK LIMITED	J0251005572140	EA
169	PRESSURE GAUGE: BOURDON TUBE 213.53 0-50	WIKA	9699223	EA
170	HAMMER UNION: FMC 5IN	WECO	FIG1502	EA
171	PRESSURE GAUGE: BOURDON TUBE 233.34 0-10	WIKA	9834120	EA
172	HAMMER UNION: THREADED 6IN FIG 200 2KPSI	KEMPER	020600	EA
173	PRESSURE GAUGE: BOURDON TUBE 232.53 0-30	WIKA	9768670	EA
174	HANDLE: 10 POSITION SANITARY 12″	DEMCO	22323002	EA
175	HAMMER UNION: THREADED 4″ FIG 200/206	FORUM ENERGY TECHNOLOGIES	4XFIG200206	EA
176	HAMMER UNION: 200 SERIES THREADED 3IN	DIXON	HU200300	EA
177	HAMMER UNION: ASSY 8IN FIG 200 BUTTWE	KEMPER	20810	EA
178	HANDLE: 10 POSITION SANITARY 10″	DEMCO	22322003	EA
179	HANDLE: 10 POSITION SANITARY 5″ TO 6″	DEMCO	22320003	EA
180	LIP SEAL: WECO 1-1/2IN	WECO	3253623	EA
181	GATE:	DEMCO	J00192600X	EA
182	HAMMER UNION: 4″ FIG 602 6000PSI BUT WEL	KEMPER	620420	EA
183	GATE VALVE: 2IN DEMCO 7500PSI	DEMCO	J025200-2572140	EA
184	PRESSURE GAUGE: BOURDON TUBE 132.53 0-50	WIKA	4285591	EA
185	HAMMER UNION: 3″ FIG200 WELD TYPE	KEMPER	020310	EA
186	NUT  WING 10IN	KEMPER	PS100N	EA
187	NUT  WING	KEMPER	PS120N	EA
188	TEE: ASSEMBLY UNION 2IN FIG 1502 P505	FMC	P505364	EA
189	HAMMER UNION: BUTT-WELD 8IN FIG206 2KPSI	KEMPER	260810	EA
190	HAMMER UNION: 3IN FIG 602	FMC	FIG6023	EA
191	PIPE UNION: 3IN	WECO	3200292	EA
192	HAMMER UNION: WING 4IN2K PSI THREAD ENDS	FMC	3200914	EA
193	GATE VALVE GATE: 2IN  2-5KPSI	BAKER HUGHES	051815908	EA
194	VALVE SEAT: GATE 3IN 5KPSI STEEL	FORUM OILFIELD TECHNOLOGIES	051820621	EA
195	GATE VALVE GATE: 3IN 2/3/5KPSI ST/ST	FORUM OILFIELD TECHNOLOGIES	051818808	EA
196	VALVE STEM: 5INX4IN 6INX4IN 5KPSI WP	FORUM OILFIELD TECHNOLOGIES	051820208	EA
197	SEAL: AIR 8IN (200 MM) P/N3207148	BEST INDUSTRIES	3207148	EA
198	SWIVEL JOINT: LONGSWEEP	WECO	3144650	EA
199	VALVE SEAT: B/FLY 4IN BUNA-N SERIES NE-C	DEMCO	1792031	EA
200	GATE VALVE GATE: 2 TO 2-1/2IN 2-5K	DEMCO	J001887-002	EA
201	GATE:	DEMCO	1926002	EA
202	HAMMER UNION: THREADE 1000 CWP FIG.100 4	WECO	13550295	EA
203	RELIEF VALVE: 2IN X 3IN 100PSI M X FE	KUNCLE VALVE	912BJHM01JE0100	EA
204	RELIEF VALVE: PRESSURE SAFETY 3/4″ 260PS	KUNCLE VALVE	6010EDM01KM	EA
205	RELIEF VALVE: 2IN 70PSI 912 BJHM 01-J	NOV-ANSON	912BJHM01JE	EA
206	RELIEF VALVE: SAFETY 1/2IN 150PSI	KUNCLE VALVE	6010DCM01KM	EA

Field Failure Repair Case Studies

Case 1: Demco 6″ NE-C Butterfly Valve Leakage

A drilling rig experienced severe mud leakage from a 6″ Demco NE-C butterfly valve due to a worn Buna-N seat. Installing an OEM replacement seat (1798031) restored bubble-tight shutoff, eliminated mud loss, and resumed normal flow control operations without system shutdown delays.

Case 2: Hammer Union Seal Failure in 4″ FIG 1502 Connection

A 4″ FIG 1502 hammer union lost pressure integrity due to a degraded WECO seal ring, causing fluid leakage. Replacing the worn seal with a genuine OEM union seal (3205604) restored full 10,000 PSI pressure rating and secured the pipeline connection safely.

Case 3: DM7500 2″ Gate Valve Handle Malfunction

A 2″ Demco DM7500 gate valve failed to open/close smoothly due to a faulty locking handle assembly. Swapping the damaged handle with an OEM Demco locking handle (24227-001) restored precise valve operation and 10-position flow regulation.

Frequently Asked Questions (FAQ)

Question	Answer
Are these parts compatible with all Demco NE-C butterfly valve sizes?	Yes, these spares fit 2″-12″ Demco NE-C Series iron butterfly valves, with direct OEM part number matching for perfect fitment.
What pressure ratings do these gate valve repair kits support?	DM7500 repair kits are rated for 5000-7500 PSI working pressure, compliant with API 6A standards for high-pressure mud valves.
Do these hammer union seals fit FIG 1502/1002/602 connections?	Yes, the seal kits and O-rings are precision-sized for standard FIG 602, 1002, and 1502 hammer union connections across 1″-16″ sizes.

Procurement Guidance & Closing Value Statement

This Demco butterfly valve and gate valve spare parts list serves as both a formal procurement benchmark and a technical troubleshooting reference, designed to minimize costly flow control downtime, reduce long-term maintenance costs, and uphold the pressure integrity and safety of your fluid handling systems. Each part is a verified OEM-grade replacement that eliminates the risks of substandard aftermarket components, ensures compliance with API oilfield standards, and delivers consistent performance under extreme drilling and production conditions.

Whether you need to replace worn valve seats, repair leaking hammer unions, overhaul faulty gate valves, or stock critical wear parts for routine maintenance, this parts catalog delivers the durability, precision, and pressure rating your operation demands. Secure your supply of authentic Demco flow control spare parts today to protect your equipment investment, maintain uninterrupted fluid handling workflows, and keep your rig and pipeline operations running safely and efficiently.