Type
10Standard Pressure Bolted Diaphragm Seal (up to 2,000 psi / 3.0" Diaphragm)
10HElevated Pressure Bolted Diaphragm Seal (up to 5,000 psi / 2-1/2" Diaphragm)
Product page
NOSHOK
Type 10/10H Standard & Elevated Pressure Replaceable Diaphragm Seals
NOSHOK Type 10 and Type 10H Bolted Replaceable Diaphragm Seals are designed to isolate and protect pressure measuring instruments (dial gauges from 2-1/2" to 6", pressure transmitters, transducers, and switches) from high process temperatures, corrosive media, slurry clogging, and crystallization. Built with a bolted two-piece flanged housing and an internal elastomeric/metallic O-ring seal, they feature an easily replaceable flexible diaphragm clamped between the upper and lower housings. The Type 10 is rated for standard working pressures up to 2,000 psig (3.0" diaphragm, 3.2 ml volumetric displacement), while the Type 10H features a continuous-duty upper housing rated for elevated pressures up to 5,000 psig (2-1/2" diaphragm, 1.4 ml displacement). Both types offer versatile process connections from 1/4" NPT to 1-1/2" NPT, optional 1/8" or 1/4" NPT flushing ports for in-line cleaning without process removal, direct or remote capillary mounting, and an extensive selection of corrosion-resistant wetted alloys including 316 Stainless Steel, Hastelloy C-276, Monel 400, Inconel 600, Titanium Grade 4, Tantalum, PTFE, and FKM.
Isolates pressure gauges (2-1/2" to 6"), transmitters, transducers, and switches from extreme temperatures, corrosive chemicals, and clogging slurries
Type 10 standard pressure rating up to 2,000 psig (3.0" diaphragm diameter, 3.2 ml displacement)
Type 10H elevated pressure rating up to 5,000 psig with continuous-duty upper housing (2-1/2" diaphragm, 1.4 ml displacement)
Replaceable clamped diaphragm design enables cost-effective maintenance and material changeovers without replacing entire seal assembly
Ready for quotationShare your range, connection and case requirement.
Talk to ATHSeal typeThreaded bolted housing with replaceable clamped diaphragm (flanged available on request)
Pressure ratingsType 10: 0 psig to 2,000 psig (140 bar); Type 10H: 0 psig to 5,000 psig (350 bar)
Instrument compatibilityPressure gauges (2-1/2" to 6"), transducers/transmitters, and pressure switches (min span 0-30 psig)
Diaphragm size & displacementType 10: 3.0" (3.2 ml displacement); Type 10H: 2-1/2" (1.4 ml displacement)
Diaphragm materials316 SS, Hastelloy C-276, Monel 400, Inconel 600, Tantalum, Titanium Gr. 4, PTFE*, FKM* (*Type 10 only)
Upper housingCarbon Steel with polyurethane enamel coating or 316 Stainless Steel; Type 10H is continuous duty
Lower housingCarbon Steel, 316 Stainless Steel, Hastelloy C-276, Monel 400, Inconel 600, Titanium
O-ring sealing materialsNBR (standard with 316 SS), FKM (standard with FKM), PTFE (standard with other alloys)
Instrument connections1/4" NPT female (code 02) or 1/2" NPT female (code 04)
Process connections1/4" NPT (02), 1/2" NPT (04), 3/4" NPT (06), 1" NPT (08), 1-1/4" NPT (10), 1-1/2" NPT (12)
Flushing connectionsOptional 1/8" NPT (1F), 1/4" NPT (2F), dual ports, or flush port plug (P)
BoltingZinc-plated high-strength Steel; optional Stainless Steel bolting
Part number example10 - 02 S - S - B - 04 S - 1F
Technical data
Selection and ordering reference
Configure seal type (Type 10 or 10H), instrument connection, wetted materials, process connection, and flushing port options.
Pressure limit2,000 psi (10) / 5,000 psi (10H)
Flange OD4.00" (102 mm)
Displacement3.2 ml (10) / 1.4 ml (10H)
Diaphragm alloys316 SS, Hastelloy C, Monel, Inconel, Ti, Ta
Process connections1/4" NPT to 1-1/2" NPT
Flushing portOptional 1/8" or 1/4" NPT
Instrument Connection & Upper Housing
02 C1/4" NPT female, Coated Carbon Steel upper housing
02 S1/4" NPT female, 316 Stainless Steel upper housing
04 C1/2" NPT female, Coated Carbon Steel upper housing
04 S1/2" NPT female, 316 Stainless Steel upper housing
Diaphragm Material
S316 Stainless Steel (standard)
HHastelloy C-276
MMonel 400
NInconel 600
ATantalum
UTitanium Grade 4
TPTFE (*Type 10 only)
VFKM (*Type 10 only)
O-Ring Material
BNBR (standard with 316 SS diaphragm)
TPTFE (standard with exotic alloy diaphragms)
VFKM (standard with FKM diaphragm)
Process Connection & Lower Housing
02 S / 04 S1/4" NPT or 1/2" NPT, 316 Stainless Steel lower housing
06 S / 08 S3/4" NPT or 1" NPT, 316 Stainless Steel lower housing
10 S / 12 S1-1/4" NPT or 1-1/2" NPT, 316 Stainless Steel lower housing
04 H / 04 M1/2" NPT, Hastelloy C-276 or Monel 400 lower housing
04 N / 04 U1/2" NPT, Inconel 600 or Titanium lower housing
04 C1/2" NPT, Carbon Steel lower housing
Flushing Connection Options
1F1/8" NPT flushing port
2F1/4" NPT flushing port
PFlush port plug (matches lower housing alloy)
Part number example
10 - 02 S - S - B - 04 S - 1F
10TypeStandard pressure seal
02 SInstrument1/4" NPT 316 SS upper
SDiaphragm316 Stainless Steel
BO-ringNBR O-ring
04 SProcess1/2" NPT 316 SS lower
1FFlushing1/8" NPT flushing port
Technical specifications
Pressure limit2,000 psi (10) / 5,000 psi (10H)
Housing diameter4.00" (102 mm) flanged OD
Wetted materials316 SS, Hastelloy C, Monel, Inconel, Ti, Ta
Instrument ports1/4" NPT, 1/2" NPT female
Process ports1/4" NPT to 1-1/2" NPT female
Flushing portsOptional 1/8" NPT or 1/4" NPT
Operating notes
Replaceable clamped diaphragm design lowers lifetime maintenance cost in corrosive and slurry service.
Type 10H continuous duty housing prevents system fill fluid loss upon instrument disconnection.
Flushing connections permit in-line sediment cleaning without dismantling the process pipeline.
Product Description
NOSHOK Type 10 and Type 10H Replaceable Diaphragm Seals provide a dependable mechanical barrier separating sensitive pressure instruments from harsh industrial process media. By transferring system hydraulic pressure through a flexible diaphragm and an incompressible transmission fill fluid, these seals protect pressure gauges, transmitters, and switches from premature failure caused by extreme process temperatures, chemical corrosion, suspended solids, slurries, and rapid fluid crystallization.
The bolted two-piece design allows the diaphragm and lower housing to be quickly inspected, cleaned, or replaced in the field without discarding the entire instrument assembly. Type 10 is engineered for standard industrial applications up to 2,000 psig, whereas Type 10H utilizes a reinforced continuous-duty upper housing rated for high-pressure service up to 5,000 psig. Both seals support flushing ports for purging solids buildup without breaking line containment.
Clamped replaceable diaphragm construction minimizes life-cycle maintenance costs in severe media
High pressure capability up to 5,000 psig with Type 10H continuous-duty upper housing
Broad metallurgical compatibility for aggressive acids, caustics, chlorides, sour gas, and abrasive fluids
Flushing port options (1/8" or 1/4" NPT) simplify periodic sediment cleanout and zero calibration verification
Available with factory capillary tubing and cooling elements for high temperature process lines
Ordering Information
Types10 = Standard Pressure (2,000 psi max); 10H = Elevated Pressure (5,000 psi max)
Instrument connection sizes02 = 1/4" NPT female; 04 = 1/2" NPT female
Upper housing materialsC = Polyurethane enamel coated Carbon Steel; S = 316 Stainless Steel
Diaphragm materialsS = 316 Stainless Steel; H = Hastelloy C-276; M = Monel 400; N = Inconel 600; A = Tantalum; U = Titanium Grade 4; T = PTFE (*Type 10 only); V = FKM (*Type 10 only)
O-ring materialsB = NBR (standard with 316 SS); T = PTFE (standard with exotic alloys); V = FKM (standard with FKM)
Process connection sizes02 = 1/4" NPT; 04 = 1/2" NPT; 06 = 3/4" NPT; 08 = 1" NPT; 10 = 1-1/4" NPT; 12 = 1-1/2" NPT
Lower housing materialsC = Carbon Steel; S = 316 Stainless Steel; H = Hastelloy C-276; M = Monel 400; N = Inconel 600; U = Titanium
Optional flushing connections1F = 1/8" NPT flushing port; 2F = 1/4" NPT flushing port; P = Flush port plug (matches lower housing material)
Part Number Example
Standard example10 - 02 S - S - B - 04 S - 1F
Type10 = Standard pressure replaceable diaphragm seal (2,000 psi max)
Instrument connection & upper02 S = 1/4" NPT instrument connection, 316 Stainless Steel upper housing
Diaphragm materialS = 316 Stainless Steel diaphragm
O-ring materialB = NBR O-ring
Process connection & lower04 S = 1/2" NPT process connection, 316 Stainless Steel lower housing
Flushing connection1F = 1/8" NPT flushing port
Product Specifications
Working pressure limitType 10: up to 2,000 psig (140 bar); Type 10H: up to 5,000 psig (350 bar)
DisplacementType 10: 3.2 ml (large diaphragm 3.0"); Type 10H: 1.4 ml (diaphragm 2-1/2")
Instrument compatibilityGauges 2-1/2" to 6", electronic transmitters, transducers, pressure switches
Operating temperatureDetermined by fill fluid and material rating (Silicone oil, Halocarbon, Glycerin)
Flange diameter4.00" (102 mm) outer diameter on both Type 10 and Type 10H
HeightType 10: 2.00" (51 mm); Type 10H: 1.95" (49 mm)
BoltingHigh-tensile Zinc-plated Steel bolts standard; optional Stainless Steel bolts
Operating & Selection Notes
Fill Fluid Selection: Fill fluids must be chemically compatible with the process media to prevent hazards in the event of diaphragm damage (e.g., Glycerin must never be used with strong oxidizing agents such as chlorine, oxygen, nitric acid, or hydrogen peroxide).
Temperature Dissipation: For elevated media temperatures above instrument limits, specify a cooling element or remote capillary line filled with high-temperature silicone fluid.
Flushing Port Maintenance: Flushing connections (1F / 2F) enable cleaning of particulate buildup from the wetted lower cavity without depressurizing or dismantling the process line.
Type 10H continuous duty design prevents fill fluid loss if the attached pressure gauge or transducer is removed.
Large volumetric displacement provides excellent sensitivity and minimal thermal drift on low-pressure spans.
Broad alloy availability ensures long service life in corrosive acids, chlorides, and caustic chemical applications.