Demco-Butterfly-Valves-Series NF-C lug 14 in.

描述

Demco butterfly valves are engineered for oil and gas drilling operations, covering a full size range from 2″ (50 mm) to 24″ (600 mm). The product line features modular designs across multiple series (NE-C, NE-I, NE-D), connection types (wafer, lug), and material options, ensuring compatibility with high-pressure, corrosive environments. Below is a detailed overview of core components and their model numbers:

1. Body Systems

Demco provides three main body series (NE-C, NE-I, NE-D) with wafer and lug connections, available in ASTM A395 ductile iron, ASTM B148 aluminum bronze, ASTM A216 WCB steel, and ASTM A351 stainless steel:

NE-C Series (2″–12″)

• Wafer Connection(ASTM A395 ductile iron, -011):
  2″ (22137-011), 2½” (22138-011), 3″ (22139-011), 4″ (22140-011), 5″ (22141-011), 6″ (22142-011), 8″ (22143-011), 10″ (22144-011), 12″ (22145-011).
• Lug Connection(ASTM A395 ductile iron, -051):
  2″ (21986-051), 2½” (21987-051), 3″ (21988-051), 4″ (21989-051), 5″ (21990-051), 6″ (21991-051), 8″ (21992-051), 10″ (21993-051), 12″ (21994-051).

NE-I Series (2″–12″)

• Wafer Connection(Multi-material: ASTM A395 -011, ASTM B148 -013, ASTM A216 -014, ASTM A351 -018):
  2″ (22681-01X), 2½” (22682-01X), 3″ (22683-01X), 4″ (22684-01X), 5″ (22685-01X), 6″ (22686-01X), 8″ (22687-01X), 10″ (22688-01X), 12″ (22689-01X).
• Lug Connection(Multi-material: ASTM B148 -053, ASTM A216 -054, ASTM A351 -058):
  2″ (22695-05X), 2½” (22696-05X), 3″ (22697-05X), 4″ (22698-05X), 5″ (22699-05X), 6″ (22700-05X), 8″ (22701-05X), 10″ (22702-05X), 12″ (22703-05X).

NE-D Wafer (2″–12″)

(ASTM A395 ductile iron, -0X1):
2″ (22187-021), 2½” (22682-011), 3″ (20594-021), 4″ (22189-021), 5″ (22190-021), 6″ (22191-021), 8″ (22687-011), 10″ (22192-021), 12″ (22689-011).

Extended Sizes (14″–24″)

• Lug Connection(Ductile iron, -051):
  14″ (23827-051), 16″ (23911-051), 18″ (23901-051), 20″ (23891-051), 24″ (23875-051).
• Wafer Connection(Ductile iron, -012):
  14″ (23825-011), 16″ (23907-011), 18″ (23899-011), 20″ (23881-011), 24″ (23873-011).

2. Seat Sealing

Seats are available in Buna-N, FKM, EPDM, and natural rubber, tailored to temperature and chemical resistance requirements:

Standard Sizes (2″–12″)

1786-XXX (2″), 1788-XXX (2½”), 1790-XXX§§ (3″), 1792-XXX (4″), 1794-XXX (5″), 1002-XXX (6″), 1798-XXX (8″), 1815-XXX (10″), 1817-XXX (12″).
Materials: Buna-N (-031), FKM (-034), EPDM (-135), natural rubber (-036).

Extended Sizes (14″–24″)

23829-03X (14″/16″/18″/20″), 7103-03X (24″).
Materials: Buna-N (-031), FKM (-034), EPDM (-X35).

3. Disc Regulation

Discs cover 200 psi, 285 psi pressure ratings and throttling applications, with materials including 316 SS, nickel-plated ductile iron, aluminum bronze, and ZPEX ductile iron:

Standard Sizes (2″–12″)

• 200 psi: 22045-0XX (2″), 22046-0XX (2½”), 22047-0XX (3″), 22048-0XX (4″), 22049-0XX (5″), 22050-0XX (6″), 22051-0XX (8″), 22052-0XX (10″), 22053-0XX (12″) (316 SS -002, nickel-plated ductile iron -005, etc.).
• 285 psi: 22196-0XX (2″), 22197-0XX (2½”), 22198-0XX (3″), 22199-0XX (4″), 22200-0XX (5″), 22201-0XX (6″), 22202-0XX (8″), 22203-0XX (10″), 22204-0XX (12″) (aluminum bronze -014).
• Throttling: 22214-0XX (2″), 22215-0XX (2½”), 22216-0XX (3″), 22217-0XX (4″), 22218-0XX (5″), 22219-0XX (6″), 22220-0XX (8″), 22221-0XX (10″), 22222-0XX (12″) (316 SS -002, nickel-plated ductile iron -005, aluminum bronze -014, ZPEX ductile iron).

Extended Sizes (14″–24″)

• 150 psi: 23830-0XX (14″), 23915-0XX (16″), 23905-0XX (18″), 23895-0XX (20″), 23877-0XX (24″) (316 SS -002).
• 285 psi: 25309-0XX (14″), 25310-0XX (16″), 25311-0XX (18″), 25312-0XX (20″), 25313-0XX (24″) (aluminum bronze -014).
• PVF-Coated (Nickel-Plated): 24460-001 (14″), 24461-001 (16″), 24462-001 (18″), 24463-001 (20″), 24464-001 (24″) (nickel-plated iron -005).

4. Stem Assembly

Stems (upper and lower) support NE-C, NE-I, NE-D series and Utility top configurations, with materials 416 SS (-001) or 316 SS (-002) for high strength and corrosion resistance:

Standard Sizes (2″–12″)

• Upper Stem (NE-C): 22066-00X (2″), 22067-00X (2½”), 22067-00X (3″), 22068-00X (4″), 22069-00X (5″), 22069-00X (6″), 22070-00X (8″), 22071-00X (10″), 22072-00X (12″).
• Upper Stem (NE-I/NE-D): 22073-00X (2″), 22074-00X (2½”), 22074-00X (3″), 22075-00X (4″), 22076-00X (5″), 22076-00X (6″), 22077-00X (8″), 22078-00X (10″), 22079-00X (12″).
• Utility Top (NE-C): 22334-00X (2″), 22335-00X (2½”), 22335-00X (3″), 22336-00X (4″), 22337-00X (5″), 22337-00X (6″), 22338-00X (8″), 22339-00X (10″), 22340-00X (12″).
• Utility Top (NE-I): 22341-00X (2″), 22342-00X (2½”), 22342-00X (3″), 22343-00X (4″), 22344-00X (5″), 22344-00X (6″), 22345-00X (8″), 22346-00X (10″), 22347-00X (12″).
• Lower Stem: 22080-00X (2″), 22081-00X (2½”), 22081-00X (3″), 22082-00X (4″), 22083-00X (5″), 22083-00X (6″), 22084-00X (8″), 22085-00X (10″), 22086-00X (12″) (material matches upper stem).

Extended Sizes (14″–24″)

• Upper Stem: 23833-00X (14″), 23917-00X (16″), 23897-00X (18″), 23897-00X (20″), 23879-00X (24″) (416 SS -001, 316 SS -002).
• Lower Stem: 23834-00X (14″), 23918-00X (16″), 23898-00X (18″), 23898-00X (20″), 23880-00X (24″) (material matches upper stem).

5. Auxiliary Components

Auxiliary parts (spring pins, retainers, O-rings, bearings) ensure system reliability with standardized models for interchangeability:

Spring Pins (2 pcs, 302 SS)

• 2″–4″: 5448-18720; 5″–6″: 5448-18724; 8″–12″: 5448-25028.
• 14″: 5446-25040; 16″: 5446-25040; 18″–20″: 5446-25048; 24″: 5446-25064.

Retainers (Stainless Steel/Steel)

• 2″–3″: 22117; 4″: 13704; 5″–8″: 13705; 10″: 13706; 12″: 13707.
• 14″: 5502-137; 16″: 5502-150; 18″–20″: 5502-175; 24″: 24470.

O-Rings (Buna-N)

• Top O-ring: 2″–3″ (5526-114), 4″ (5526-115), 5″–8″ (5526-117), 10″ (5526-119), 12″ (5526-125).
• Stem O-ring: 2″ (5526-113), 2½”–3″ (5526-115), 4″ (5526-116), 5″–8″ (5526-212), 10″ (5526-214), 12″ (5526-220).
• Disc O-ring (Extended Sizes): 14″ (5526-220), 16″ (5526-223), 18″–20″ (5526-328), 24″ (5526-331).

Bearings (Bronze, 2 pcs for Upper/1 pc for Lower)

• Upper Bearing: 2″ (22526-001), 2½”–3″ (22118-001), 4″ (13112-001), 5″–8″ (13115-001), 10″ (13116-001), 12″ (13117-001), 14″ (5086-044), 16″ (5086-050), 18″–20″ (5086-048), 24″ (5086-046).
• Lower Bearing: 2″ (5086-045), 2½” (5086-051), 3″ (5086-049), 4″–20″ (5086-049), 24″ (5086-047).

 

Demco butterfly valves deliver precise fluid control for oil and gas drilling through a comprehensive range of standardized models (2″–24″), material customization, and structural adaptability. The interchangeable components ensure operational efficiency, while robust materials and designs guarantee reliability in high-pressure, corrosive environments.

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Contact info
What’s app +8615972752793
Luben@youlongpetro.com

 

You Long Petroleum Machinery Spares ltd.(YOU LONG PETRO) engages in the export of the petroleum equipment and materials and provides materials and equipment

for CNPC and SINOPEC’s overseas projects. Established in 2003,YOU LONG PETRO has started the manufacturing and

supplying of petroleum materials and equipment since 2003.YOU LONG PETRO has provided its products and

services to 36 countries and regions across the globe.YOU LONG PETRO’s export performance has come

out top in central enterprises in successive years and it has been acknowledged as China’s largest supplier of

petroleum and petrochemical materials，which is based on design,production,sale and technical service.Our products are completely interchangeable

with the following enterprises.
The products are asfollows:
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2、Oil drilling rig parts & Workover rig parts (RG, SJPETRO,DFXK etc),
3、Parts for hydraulic disc brake (BPM,Boke,Bomco,RG)
4、ATDPush-plate clutch and parts & WCB2 Auxiliary brake parts.
5、ZQ Drill pipe power tongs and parts,TQ Series of casing power tongs and parts.
6、CB/LT series:Air tube clutch and parts.
7、Agent products such as: Bearings, Chains, Cardan shaft,V-belt,engine etc

 

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